Nice to see some new life in an old thread.
I have researched possible led sources further, and i am still stumped at how they claim to achieve an equivalent of 50W incandescent. I have looked at several 3W led sources, but none of them achieve more lumens than equivalent to 20W. That and the rather long batterie life leeds me to suspect that they might be stretching the truth a bit in their specs. Any one out there had a first hand look at the lamp?
I still dont see that it should get as hot as you claim it would though. I have tried out some pretty large arrays without reaching temperatures as high as that.
The point about color change is very interesting though. I assume the colored plastic might counteract the color change in the leds, so that you avoid a goolish litt romatic dinner.