China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

1, on the energy efficiency analysis, comparison

 

( 1 ) High power lamps(≥ 250W) : High pressure sodium lighting efficiency , considering the loss of magnetic ballast , lamps and optical channel utilization efficiency of the three factors , if the overall efficiency by 0.55 meter , the effective optical efficiency is about sodium 70 ~ 751m / W; while effective optical efficiency of LED lights , currently in the United States is about 621m / W, the best domestic enterprises has reached 56 ~ 581m / W. Therefore, the high-power lamps , LED energy efficiency than sodium to be lower .

 

( 2 ) low-power lamp (≤ 150W) . Sodium effective optical efficiency ( included in the overall efficiency of 0.55 ) is about 45 ~ 551m / W, while the LED based upon the 56 ~ 581m / W meter , the LED can achieve energy than sodium 10% to 20 %, up 30%.

 

2 , the light source color analysis of road lighting effects

 

HPS correlated color temperature (Tcp) is about 2100K , is a warm color temperature , the color rendering index (Ra) is only 23 to 25 , the color is low ; while the color temperature of LED lights are now using much at 5300K, the color temperature is cold , better products, the Ra up to 70 ~ 80 , the color is good .

 

3 , economic comparison

 

High-pressure sodium lamps, each about 1200 ~ 1500 RMB ; present LED lights, according to the power of different sizes , the price difference is large, about 4000 ~ 8000 yuan. In their current state , LED lights clearly too expensive , the price of up to 3 to 5 times the giant . As previously ? Less than 150W of LED can save 10% to 30 % per year per lamp saving about 50 ~ 150KWh, simply can not spend more options lamp recycling costs . Can only hope that in the coming years , LED development trend of its price will gradually decline , to further improve energy efficiency , and then compare their economic performance.

 

4 , life time, comparative

 The life time should be based on the whole lamp life. HPS include lighting, electrical accessories ( mainly HPS ballasts ,ignitors ) and lamps, sodium lamps Average life expectancy for 3 to 5 years , energy-saving ballasts not less than 20 years, the lighting as well. The LED lamp life no experience with existing enterprise known as the 50000 , 60000 hours , there is no reliable basis . U.S. Energy Star requirements set is divided into two tranches of not less than 35000h and 25000h , mainly LED chip life is very long, but with encapsulated temperature, heat , and many other factors, a great relationship , in addition to an electronic circuit device driver Component life issues, such as capacitors often only 8000h to 10000h. So overall , said , LED lights and sodium lamp life can not be compared .