Chip
PN junction temperature Tj <85 ℃, can only ensure that the working
life of up to 5 million hours and the PN junction to the chip itself,
thermal films (Tjs) temperature rise ΔT = 6 ~ 15 ℃ between the other LED light efficiency and operating temperature inversely
proportional to the performance characteristics, each increase in 10 ℃,
can lead to bad light 5 to 8 percent, and half life of the serious
consequences, and general publicity LED can work at 100 ℃ service life
of up to 10 thousand hours a far cry from the idea.
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