Join Date: Aug 2016
Location: Saigon - Vietnam
I am running a led fixture made out of a fluorescent fixture and a MC PCB: 8 1W are soldered to a MCPPCB which is glued to the aluminium shade by means of a glue and thermal paste. See photo for your reference.
The 8 leds are mounted into 2 series of 4 leds.
When leds are supplied with a 175mA current, the temp on the aluminum shade (right at the back of the PCB) is about 35°C while the ambiant temp is about 30°C. But when supplied with 350mA, the nominal current, the temperature would raise up to roughly 60°C.
In my opinion, the heat is partly because those led are cheap and ineffcient. My question is if i swapped them agaisnt better chip leds with proven efficiency of about say 130lm/W, Would i still need to add up radiators to my homemade fixture ?
Last edited by Tran; 11-14-2016 at 04:07 AM.
Reason: add photos