Application of LED surface light source

Refers towards the light emitting mode, relative to your LED stage light source and ordinary light supply, the current light supply this kind of as flat light source, LED light source features a soft, not to harm the eyes, power, light, natural as well as other qualities, is an critical course while in the advancement of light source goods. There are actually some apparent limitations during the current LED light source, but in an effort to company needs and deliberately ignored these concerns, summarized as follows:

A), classic LED light source is actually a laser items, so the better the power, the much more dazzling, not appropriate for use in children, but led surface light source did not this dilemma.

B), the conventional LED high power light supply heat dissipation is tiny, that is definitely, the use of a large variety of heat sink can not promptly export heat, so the light decay rapid.

C), the conventional led by lens, which is, to boost the cost and make the light angle becomes smaller and even more light bead lamp will light as well as phenomenon of uneven.

D), the classic LED lamps and lanterns are in excess of one particular lamp, the solder joints are lots of, the faults are additional, the surface light supply is significantly less, as well as installation is easy.

LED surface light source in the current stage in early use, ideal for substantial bay lighting,floodlights fixture,ceiling lamp, downlight, miner’s lamp, fluorescent lamp, bulb lights, and so on all varieties of lamps and lanterns. So we will make the surface light supply right into a circle, circular ring, square, rectangular, triangular, etc.. The strip is usually right assembled in to the fridge, cabinet, bedside lamp, mirror lamp, anchor devoid of adding fins.

How does the sodium lamp ballast do the job?

High pressure sodium lamp discharge materials vapor stress is extremely large, namely higher atomic density of sodium, sodium atoms and electron collision amongst the quantity of frequent, the resonance radiation broadening of spectral lines and also other noticeable spectrum of radiation, so the high-pressure sodium lamp light colour is superior than that of reduced strain sodium lamp. High pressure sodium lamp is really a type of high intensity gasoline discharge lamp. Due to the adverse resistance qualities of gas discharge lamps, should the lighting alone obtained the energy grid, the doing work state is unstable, using the discharge system continues, it’ll cause circuit latest rises indefinitely, until eventually the last light or circuit components and components is flow burning high pressure sodium lamp and various fuel discharge bulb, work is arc discharge state, V-I characteristic curve on the adverse slope, i.e. lighting recent rise, and the voltage utilized to a bulb dropped.

To be able to make certain the secure operation on the light bulb, a circuit has to be linked in series by using a circuit with no constructive quit to stability the damaging resistance. Resistors, capacitors, inductors, and so on., are inclined to be restricted to flow. Resistive ballast has the benefits of little dimension, price tag low-cost, and high pressure sodium lamp supporting use will take place is challenging to start off, work resistance creates a high heat, have bigger space for heat dissipation and consumption power is very big, it will eventually make the circuit lighting efficiency decreased. It’s usually utilized during the DC circuit, the usage of a hundred AC circuit within the light in the phenomenon of obvious. Capacitive ballast though not as resistive ballast its consumption electrical power, temperature rise is minimal, from the lower frequency power provide, charging the capacitor, pulse peak recent, lead to terrific harm on the electrode, lights flashing, have an effect on the services daily life with the lamp bulb; get the job done in substantial frequency circuit, voltage fluctuation can reach the perfect state, grow to be a perfect ballast.

Magnetic ballast loss is little, secure impedance, the impedance bacteria primality tiny deviation, lengthy services daily life, stable lighting than resistive ballast excellent, current and high pressure sodium lamp supporting utilization of ballast are inductive ballast. Its disadvantages are greater than benzene and high rates. Furthermore, electronic ballast has begun to seem, at current the price costly, dependability will not be and the high-voltage sodium lamp is matched, except for specific events, beneath typical situations are seldom made use of. As a result, high pressure sodium lamp and lamp ballast series needs to be corresponding specs in advance of use. High pressure sodium lamp lighting circuit is a nonlinear circuit, the electrical power issue is reduced, so within the network take into consideration a compensation capacitor is connected to improve the power issue with the network

How does the sodium lamp ballast perform?

High pressure sodium lamp discharge material vapor stress is very substantial, namely higher atomic density of sodium, sodium atoms and electron collision in between the quantity of regular, the resonance radiation broadening of spectral lines together with other visible spectrum of radiation, so the high-pressure sodium lamp light shade is far better than that of minimal stress sodium lamp. High pressure sodium lamp is a sort of substantial intensity gasoline discharge lamp. As a result of damaging resistance traits of fuel discharge lamps, should the lighting alone obtained the power grid, the operating state is unstable, together with the discharge approach continues, it’ll bring about circuit latest rises indefinitely, right up until the last light or circuit components and parts is movement burning high pressure sodium lamp and various fuel discharge bulb, work is arc discharge state, V-I characteristic curve on the detrimental slope, i.e. lighting recent rise, as well as the voltage applied to a bulb dropped.

So that you can make sure the secure operation from the light bulb, a circuit needs to be connected in series that has a circuit with no beneficial cease to balance the unfavorable resistance. Resistors, capacitors, inductors, and so on., are prepared to get constrained to flow. Resistive ballast has the advantages of modest size, cost inexpensive, and high pressure sodium lamp supporting use will occur is difficult to start out, work resistance creates a high heat, have bigger space for heat dissipation and consumption energy is quite huge, it can make the circuit lighting efficiency decreased. It truly is commonly utilised while in the DC circuit, using a hundred AC circuit during the light of your phenomenon of obvious. Capacitive ballast whilst not as resistive ballast its consumption electrical power, temperature rise is very low, inside the reduced frequency energy provide, charging the capacitor, pulse peak present, trigger good harm to the electrode, lights flashing, impact the support daily life of the lamp bulb; operate in higher frequency circuit, voltage fluctuation can attain the best state, develop into a perfect ballast.

Magnetic ballast reduction is smaller, secure impedance, the impedance bacteria primality compact deviation, prolonged support life, stable lighting than resistive ballast fantastic, present and high pressure sodium lamp supporting utilization of ballast are inductive ballast. Its disadvantages are higher than benzene and higher costs. In addition, electronic ballast has begun to appear, at existing the cost expensive, reliability will not be as well as high-voltage sodium lamp is matched, except for particular occasions, underneath usual conditions are rarely used. Hence, high pressure sodium lamp and lamp ballast series should be corresponding specifications ahead of use. High pressure sodium lamp lighting circuit is a nonlinear circuit, the power aspect is minimal, so while in the network take into account a compensation capacitor is linked to enhance the energy element on the network

Ultraviolet light prevalent sense

Robust ultraviolet radiation results towards the skin, light dermatitis, skin seems erythema, itching, blisters, edema; severe could also cause skin cancer ultraviolet function from the central nervous process can result in an elevated higher headache, dizziness, physique temperature. Position inside the eye, may cause conjunctivitis, keratitis, often known as light ophthalmia, there could be induced cataract despite the fact that UV in 4 seasons of the yr there, the winter sun light is a lot more moderate and foggy inside the north, but ultraviolet ray only than summer time weak about 20%, nonetheless will lead to terrific harm to human skin and eyes and various parts, so the winter still have to have in order to avoid ultraviolet rays.

Long lasting ultraviolet irradiation may be the most likely to induce a number of skin pigmentation. So, even inside the cold winter, outside pursuits needs to be coated with cream or sunscreen. Of course, the SPF index is sufficient for 15. If it is to go skiing or from the snow for any long time to stay, it truly is ideal to dress in goggles, to prevent ultraviolet and snow white on stimulation with the eye in recent times, a considerable variety of chemical substances destroys the ozone layer during the environment, destruction with the the safety of human health and fitness purely natural barrier. According to the National Meteorological Center, the report exhibits that due to the fact 1979, the total ozone layer in China has been reducing, plus the ozone layer has been reduced by 20 from the 14% years. The ozone layer each and every 1%, the incidence of skin cancer will rise by 3%, once the sun may be the weakest with the weakest (0 – 2), when the physique just isn’t as well large, once the sun hat can go out, when the sun is out, and within the physique painted sunscreen to prevent skin damage; when UV intensity reached six – seven, 10 – 9 pm, in the morning when the sun is ideal not to four pm.

Once the UV index is better than 10, should really test to prevent going out, mainly because at this time the ultraviolet radiation has a sure intensity and wavelength of ultraviolet radiation, irradiation material (component with the materials have to have to add a fluorescent dye), the material element emits fluorescence (light), based on the shade with the fluorescence, it is possible to ascertain the information on the element. This kind of as lead, mercury along with other hefty metals, pesticide residues might be detected by this system. The fluorescent lamp would be the utilization of the principle of most insect compound eyes are specifically delicate, 365nm ultraviolet light during the night, lit a UV lamp, the insects like light the planet as human health 280 ~ 320nm ultraviolet irradiation named ultraviolet radiation skincare, make skin cholesterol in 7 ergot dehydrogenation, converted to D3 and Weishengsu D2, to stop rickets and occupation ailment (miners) health care market place has a molecular chain variety ultraviolet lamp provide fume oxidation by ultraviolet photolysis oxidation technological innovation to change the oil, while the oxygen response during the air immediately after UV and ozone, the cold fuel oil molecules to type carbon dioxide and water, organic matter in the oil fume by photolysis oxidation, also eliminate odor.

The best way to opt for the grow plant lights

You’ll find two forms of water plants, chlorophyll a, chlorophyll B. B is just not straight involved with the photosynthetic reaction, its perform should be to transfer the absorbed light power to chlorophyll a, which could only be called “accessory pigment”, whilst chlorophyll a is immediately involved with the photosynthetic reaction, termed the “main pigment”, so in selling the perform of light, chlorophyll a is much better than chlorophyll b, but chlorophyll b also helps to absorb extra broad spectral bands. The chlorophyll a and chlorophyll b are somewhat different in construction, and also the absorption rate of light vitality is diverse, nevertheless they can soak up red and blue light, so the most effortless to carry out photosynthesis is red location and blue place.

Which chlorophyll a inside the blue area of the absorption peak at 430 nm, from the red light district is found in 660 nm, although chlorophyll b absorption peaks in the blue region situated at 435 nm, from the red light district is located in 643nm aquatic plants chlorophyll articles towards the articles of chlorophyll a most accounted for a lot more than 75%, its absorption spectrum for aquatic weeds development major spectral. Should the combination intensity on the spectrum, the extra near to the absorption spectrum of chlorophyll a, might be the most uncomplicated to become utilized in the photosynthesis above the water, so the absorption spectrum of chlorophyll a is called the “best photosynthetic band” for photosynthesis. From your perspective of aquatic cultivation, inside the selection of light source, when the light excellent closer to chlorophyll a absorption spectra had been far more lovely, one example is, Grow plant light high quality ordinarily in accordance with chlorophyll a absorption spectra of imitation of, so concept of cultivated plants most favorable.

The use of high-pressure sodium lamp

Sodium vapour yellow light can via fog, high pressure sodium lamp with sodium manufacturing extensively utilized in road lighting. Because it doesn’t lower the degree of heat and might minimize power consumption, so there is a trend to exchange the high-pressure mercury lamp. As a result of high pressure sodium lamps from long array, through fog and powerful illumination, to the road plane numerous times increased than the large pressure mercury lamp.

The lamp could also be utilised for washing the photograph darkroom, mainly because this doesn’t make the paper light metal sodium fluorescence purpose in industry and that is primarily made use of for: sodamide system of sodium cyanide; working with sodium powerful reducibility, potassium substitute metal potassium chloride reduction; four titanium sponge titanium, also may be made of unusual metal tantalum and niobium effortlessly; the formation of alloy properties making use of sodium, planning of tetraethyl lead lead sodium alloy production, strengthen the octane value of gasoline antiknock capacity, increase; planning of potassium sodium alloy makes utilization of sodium coolant; simple oxidation properties, manufacturing of sodium peroxide as being a bleaching industrial bleaching agent, can’t be manufactured into sodium superoxide as artificial oxygen production; sodium borohydride as rust agent of zinc iron metallurgical business; together with the metallic sodium and ammonia response of sodium amide as intermediates of dyestuff industry for selected Indigo powder; production of sodium borohydride, formic acid, triethyl orthoformate acetic ester and other pharmaceutical intermediates; high purity sodium may be used as heat carrier for nuclear reactor.

Grow plant necessary spectra

Distinct wavelengths of light for plant photosynthesis, the influence is not really, the need to have for the light of the plant photosynthesis, wavelength within the 400-720nm.
In accordance towards the over principle, the plant lamp is made from red and blue blend, all blue and red three types, in order to give two red and blue wavelengths of light, covering photosynthesis wavelength range. During the visual result, the red and blue mixture of plant light is pink and white LED lights, the most typical will be the use of blue core, yellow fluorescent powder, resulting in a blend of white light. Power distribution, you can find two peaks from the blue place of 445nm as well as the yellow green location of 550nm. And the plants have to have 610-720nm red light, is quite short. This explains why in the white LED irradiation, plant development,

LED plant development lights in the red and blue lamp configuration ratio, normally, flowers, or leaf veggies, select the 4-6:1, so that slightly blue light, because the blue light is conducive to the development of plant leaves. The flower at anthesis. 7-9:1 fill, allow the red light a lot more, due to the fact on the red light to plants blossom and result. From seedling to blossom within the whole growth time period to fill, 6-7:one within the line. Don’t forget to find out, from the purple light of your holly seedlings, lengthy, however the leaves are very tiny, the root is also shallow, a poor nutrition. Beneath the yellow light of the seedling just isn’t only short, the leaves look no lifestyle. And within the red, blue, the development from the development in the holly is the ideal, not just solid, but in addition really well-developed root process. According to the introduction, this light supply of red light bulbs and blue light bulbs are in accordance together with the proportion of 9:1 configuration.

On top of that to Holly seedlings, the industry experts also carried out experiments with light, Wen Xinlan, strawberry, tomato. The results show the red blue light of 9:1 is the most favorable for plant development. Red LED, 430nm blue LED, and red LED and blue LED had been utilized to kind exactly the same size from the seedlings. After three weeks, the development of seedlings was compared. The outcomes show that the pink light irradiation can advertise the development of plants. The plant development won’t demand all wavelengths in the visible light, but only the light absorption of a unique wavelength, the company mentioned. Such as, when the plants are inside the photosynthesis and flowering, the absorption peak of chlorophyll – 660nm near the red light can promote growth. And also the formation of flower, 450nm near the blue light can advertise development. Evaluating seedlings of 3 types of diverse colour of light irradiation compared with seedlings of red LED irradiation than other two strains seedling development the slowest, the general minimum. The leaves with the seedlings irradiated with blue LED were significantly less, as well as entire was elongated. And the seedlings with pink LED irradiation, the more substantial leaves, the overall growth of the plant.

Operating principle of ultraviolet light

Ultraviolet sterilization technologies in the final century was applied to explore and use, ultraviolet ray is often a substantial purity quartz tube because the casing, with higher effectiveness quartz ultraviolet lower pressure mercury disinfection lamp, can destroy bacteria, viruses as well as other microbial DNA and design, with powerful bactericidal skill, extended support life, risk-free and stable operation principle.

The core technology of ultraviolet sterilization applying UV ultraviolet germicidal lamp, when microorganisms were irradiated with ultraviolet light, the cellular DNA and RNA absorption of UV, photochemical, causing cellular constituents, particularly chemical adjustments of nucleic acid, protein using the protoplasmic and esters, make the cell qualitative adjust, and air by ultraviolet radiation created trace ozone, thus leading to bacterial cannot copy or reproduce till death, ultraviolet sterilizer maintenance and the.

A), the substitute with the lamp tube: within the lamp tube to get a 12 months or so, needs to be replaced right away, to be able to secure the high efficiency of sterilization. For substitute, really should very first flip off the energy and took out the lamp, then the new lamp meticulously to the sterilizer and installed seal ring, no water leakage phenomenon is often energized. The have to have to pay out attention is just not to touch the brand new lamp with the finger with the quartz glass, otherwise it’ll be a stain about the impact of disinfection disinfection;

B), typical inspection, to guarantee the ordinary operation of UV disinfection device. UV lamp need to be sustained during the open state, repeated switch will have an effect on the services daily life with the lamp;

C), common cleansing: ultraviolet lamp tube along with a quartz glass sleeve will need standard cleansing, with alcohol cotton ball for that lamp to wipe, remove the grime about the bushing, so as not to have an impact on the ultraviolet ray transmission rate and sterilization impact;

D), stop ultraviolet radiation: UV has powerful sterilization potential, but additionally to your human physique can have selected harm, when begins the ultraviolet germicidal UV lamp must be keep away from to illuminate the human entire body, if needed to use door

The principle of high pressure sodium lamp

Light supply of noticeable light created by sodium vapor discharge. low-pressure sodium lamp and high pressure sodium lamp. The reduced stress sodium vapor stress not more than a handful of. The reduced pressure sodium lamp discharge radiation is concentrated in 589.0 nm and 589.6 nm two double D lines. They are really really near human visual curves from the highest value (555 nm), to ensure that the luminous efficiency is particularly high, at present has reached 200 lumens per watt (LM / W), turn out to be all types of electric light source inside the luminous efficiency highest energy-saving light source. Substantial stress sodium vapour stress better than 0.01 MPa operate. High pressure sodium lamp is for very low pressure sodium lamp color is as well strong, the color is incredibly poor, as well as the advancement of long tube discharge faults. The high pressure sodium lamp is divided into ordinary variety (typical form), the luminous efficiency of 130lm / W, color rendering index RA = 25; improved, the luminous efficiency of 75lm / W) was, colour rendering index RA = 60; substantial colour shade, its luminous efficiency is 45 ~ 60lm / W, colour rendering index RA = 80 ~ 85 high-voltage sodium lamp utilised a golden white light, it has a luminous efficiency, significantly less electrical power consumption, extended service daily life, through fog and luring and so on. strengths. Widely used in street, highway, airport, dock, dock, station, square, street intersection, industrial and mining enterprises, parks, garden lighting and plant cultivation.

Substantial color high-pressure sodium lamp is mainly utilized in gymnasium, exhibition hall, amusement parks, division retailers and hotels and also other spots lighting. High pressure sodium lamp discharge materials vapor pressure is very large, namely higher atomic density of sodium, sodium atoms and electron collision among the number of regular, the resonance radiation broadening of spectral lines together with other visible spectrum of radiation, so the high-pressure sodium lamp light color is improved than that of reduced stress sodium lamp. High pressure sodium lamp is actually a type of large intensity gas discharge lamp. Due to the negative resistance qualities of your fuel discharge lamp, when the bulb is linked towards the grid, its operating condition is unstable, and also the discharge course of action continues. Sodium lamp and low-pressure sodium lamp and high pressure sodium lamp. The lower pressure sodium vapor pressure not in excess of a handful of. The lower strain sodium lamp discharge radiation is concentrated in 589.0 nm and 589.6 nm two double D lines. They are really really shut human visual curves of the highest worth (555 nm), so that the luminous efficiency is very substantial, at present has reached 200 lumens per watt (LM / W), turn out to be all varieties of electrical light source while in the luminous efficiency highest energy-saving light source. Higher pressure sodium vapour strain higher than 0.01 MPa do the job. High pressure sodium lamp is for lower strain sodium lamp color is too robust, the shade is extremely bad, as well as advancement of prolonged tube discharge faults.

The high pressure sodium lamp is divided into ordinary form (common variety), the luminous efficiency of 130lm / W, color rendering index RA = 25; enhanced, the luminous efficiency of 75lm / W) was, color rendering index RA = 60; large shade colour, its luminous efficiency is 45 ~ 60lm / W, shade rendering index RA = 80 ~ 85 high-voltage sodium lamp made use of a golden white light, it has a luminous efficiency, less power consumption, lengthy services life, as a result of fog and luring and so on. strengths. Widely used in street, highway, airport, dock, dock, station, square, street intersection, industrial and mining enterprises, parks, garden lighting and plant cultivation. Substantial colour high-pressure sodium lamp is largely utilized in gymnasium, exhibition hall, amusement parks, department merchants and hotels along with other places lighting. High pressure sodium lamp discharge material vapor stress is very high, namely substantial atomic density of sodium, sodium atoms and electron collision among the quantity of frequent, the resonance radiation broadening of spectral lines as well as other noticeable spectrum of radiation, so the high-pressure sodium lamp light shade is improved than that of lower stress sodium lamp. High pressure sodium lamp is a form of substantial intensity gasoline discharge lamp. Due to the detrimental resistance characteristics with the gasoline discharge lamp, in case the bulb is linked towards the grid, its working situation is unstable, and with the discharge process continues, it will eventually cause the infinite existing during the circuit.

What’s the ligh ballast function?

Experience of domestic electronic ballast of digital road is by the market and objective decision, it will not be because we simply agree to come round, also won’t because we simply refused to leave, but Europe and the United States, Japan and other advanced countries in energy conservation and environmental protection and lighting industry, digital electronic ballast is already in full swing in the world as a whole, green products hold sway today, believe that the domestic electronic ballast of digital road is soon coming HID lamp is a kind of high pressure gas discharge lamp, the discharge of the “V” performance showed a negative resistance characteristic, so the lamp circuit to be connected to the current limiting device, which is commonly referred to as ballast. HID lamp most work in AC state, the use of reactive devices as ballast. HID lamps have different types, according to the type of lamp and its application needs, can be configured in different forms of ballast circuit, in order to obtain the best matching ballast and lamp. The commonly used HID lamps for general lighting as a high-pressure mercury lamp, high-pressure sodium lamp and metal halide lamp. High pressure mercury lamp is in the earliest development, stable product performance, supporting mature ballast circuit. High pressure sodium lamp and metal halide lamp is modern development of new high efficiency energy-saving light source, the requirements for ballast and lamp has good matching, to achieve better comprehensive effect of high pressure sodium lamp and high pressure mercury lamp in the performance of different, high pressure sodium lamp not only mercury, but also filled with sodium, working in the light, sodium and mercury to form storage of liquid sodium and mercury gas in the discharge tube cold end part.
High pressure sodium lamp power during its lifetime, with the change of the lamp voltage change. The high-pressure mercury lamp (HPML) and different high pressure mercury lamp power changes in the lamp voltage relatively remained stable, because under the high pressure mercury lamp mercury vapor pressure in saturated condition. The relationship between high pressure sodium lamp voltage and lamp power is in the discharge tube contains excessive sodium caused by mercury gas based on. During operation of the lamp, only a portion of the mercury and sodium form vapor pressure, vapor pressure level can reflect on the lamp voltage, it depends on the discharge tube cold end of the temperature. The change of the cold end temperature causes the change of the vapor pressure, resulting in the change of the lamp voltage, and the change of the lamp power. In the relationship between certain power within the scope of the lamp voltage and lamp power approximate to linear relationship between C) best ballast characteristics curve to can make the lamp before the maximum voltage line to achieve the maximum power and the light power with the increase of the lamp voltage decreases. For a near the lamp design power line of relatively flat ballast characteristic curve than the relatively steep rise and fall of the characteristic curve more desirable d) to avoid shorten the lamp life, work or instability, ballast should can make the lamp from quadrilateral right maximum lamp electric pressure characteristics in high pressure sodium (HPS), international standards, lamps with different specifications to the ballast provides different quadrangle maps.The poor quality of the ballast will cause the lighting used during the super load operation, work or not stability Na-T1-In metal halide lamp from European manufacturing technology, the excellent performance of the lamp start, equipped with general inductance type ballast circuit, only need to trigger in the power supply voltage (220V), with lower peak voltage (less than or equal to 750V) can start the work lamp. The photoelectric performance parameters of a stable light, with a long life (average life 20000h), the characteristics of high luminous maintenance rate. After the performance improvement of Na-Tl-In type metal halide lamp, can be equipped with the same power type ballast for high pressure mercury lamp and high pressure sodium lamp ballast, and the average life of the metal halide lamp can still reach the required 20000h. So the metal halide lamp without changing the electrical appliances in the original lighting device can be conveniently replaced the original high pressure mercury lamp or high pressure sodium lamp, it is better than the former improves the light efficiency and improve the light color, also than the latter greatly improved chromogenic properties. Main parameters of the changes see table 2Sc-Na metal halide lamp from the manufacturing technique of the United States, the discharge tube structure similar to high pressure mercury lamp, working lamp the trigger and by means of the ballast for high open circuit voltage and lamp starting electrode effect, the lamp start working. If the Sc-Na type metal halide lamp using the Na-T1-h metal halide lamp circuit, not only will enable early lamps increase failure (initiation trigger fragile lamp electrode), shorten the lamp life expectancy, and increase the lamp light attenuation. As shown in Figure 9 for using different metal halide lamp “inductance ballast and trigger circuit of the decay curves on the one hand improve discharge tube structure, the abolition of the starting electrode, as shown in Figure 10B and improved chemical formula and manufacturing process, to improve the starting performance of the lamp, thus comprehensively improved the performance of the lamp. On the other hand, to improve the working circuit of the ballast, trigger to start the lamp work, so as to reduce the open circuit voltage of the ballast, which reduces the peak voltage and peak current. The working temperature of the ballast is correspondingly reduced, and increases the life span of the ballast, reduce maintenance costs in Table 4 for two types of Sc-Na metal halide lamp and ballast main performance parameters of the comparison of pulsed metal halide lamp starting Sc-Na can the better performance of the CWI and regulated.