I think I found the problem. The driver-to-LED cord was simply too long to carry enough power!

I shortened it from about 5 feet to 2 and things are back to normal.
LedElk Reviewed by LedElk on . LED-WATER-HEATSINK Hello! I am a noob DIY-LED-GUY, in need of assistance. Now, I'm about to fire up an LED-DIY grow and since this is my first time ever making an LED-LAMP I've decided to jump straight into the deep end of the pool and do a water-cooled rig. As pipes are mostly round there was an issue with lack of flat space to mount the LEDs on and the right parts was hard to find, so it kind of just ended up like it is. My question is: will it work? I have an aquarium pump that goes between the Rating: 5