Don't recall percentage but was pushing a lot of power into it around 8W. That heat obviously needs to go somewhere. Think the LEDs I had were pretty crappy th

Don't recall percentage but was pushing a lot of power into it around 8W. That heat obviously needs to go somewhere. Think the LEDs I had were pretty crappy though, so they probably produced more heat per unit of light than they should i.e. was more brute force than colour & control