Fans, good. No heatsink, not so good. I would do something to increase the mass and surface area. Bolt a few PC heatsinks to it or something. A 3mm plate will not be able to adequately cool 130W (assuming you are running at 1000mA). You simply don't have enough mass or surface area to dissipate that much heat.
Thanks for your advice.
I have successfully using just 3mm Alumin for my current 22 LEDs fixture which is running 10hrs/day and the temperature is lower than 30 degree measured with Fluke digital handheld gun thermometer. As such, I would like to try the same method with large size of alumin plate and monitor closely.
What I'm going to do once the project completed is...2 reliablity tests. First, I will be let it run for 16~20 hrs non-stop with fans on and measure the temperature end of the day. If the temperature increases to 45~50, I may consider add in proper heatsink but I doubt it needed.
Secondly test is to run for 8~10 hrs without fan, but I have to monitor very closely,(every 10~20 minutes) as I do not want my LED to be cooked.
Edited by M@rine_lover, 07 August 2009 - 06:55 PM.