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

China standards for single- capped fluorescent life test conditions : 15 ~ 50 ℃ calm environment , head up ; 50Hz ± 0.5%, 220V ± 2%. National standards for average life expectancy : 5000h.

 

Recent standards of the more important news is IESTM-21 document publishing . This is America, Illuminating Engineering Society Technical Committee after years of efforts to develop a test method . TM-21 can be inferred lumen maintenance of LED products , which is lit at different times after the LED light output. TM-21 is very important , and its importance is reflected in : LED life may be more than 50,000 hours , much longer than conventional lighting , has been tested in the end is impractical because lasted too long, and probably will , in its lifetime have been eliminated, and , LED will not be like other light sources as directly off , LED light decay is very slow , LED's "dead point" where it is still a topic of discussion .

 

To better understand the importance of TM-21 , we first look at LM-79 and LM-80. LM-79 is the integrated control circuit and heat sink of the LED products for the electrical and photometric methods found , covering a total flux, electrical power , efficiency , chrominance and luminance distribution measurements . By LM-79 can calculate the initial performance of the entire lamp . However, LM-79 does not involve product reliability and lifetime measurements. LM-80 test is the different temperature LED package , array and lumen maintenance module , tested at least 6000 hours to 1000 hours each for advanced , recommended to test 10,000 hours . But even if the test 10,000 hours , but also far less than most LED products on the market that claim to life. TM-21 can be tested in a relatively small period of time to estimate the lighting is not the same after a long lumen maintenance dose to make up for an important performance testing vacancies , which is very important. However , TM-21 only covers the LED package , array and module testing, other components will affect lamp life , such as driving , thermal management and packaging , if these have been taken into account will be more meaningful.