...my current blueprint for my next light i may sell.
it uses almost a cool hood with a plate of alum with a tapped temp sending unit that when the aluminum gets it x degrees the fan will come on and exhaust the heat out. A fully mount plug and play kit.
Sounds interesting! Not long ago someone (AirAnt?) referred me to
SolisTek HiLED (<<link). I thought I'd seen the future then too. All white, with user-swappable color temps (as easy as unscrewing a light bub), heat-extraction hood. Now the Eonstar Matrix with more automatic color changes, and you with your hood.
Heat's probably not a big issue for most people. LEDs don't produce that much. But, some of us in hot climates are concerned with even small contributions. I think the ideal light would be
1. Mostly fin cooled (like Astir) but not with heatsinks that would be sufficient for 85-degree ambient temperature, just 70 degree.
2. Then a thermostat fan for ambient temps over 70, when the heatsinks won't do the job.
3. Then, an optional hood for those who would like to extract the heat more effectively, letting the extraction fan do the work, with the light's integrated fans serving as a failsfe.
I think the challenge for #3 would be how to keep the hood/light airtight so it wouldn't introduce odors post-filter.
And then color-temp changing. Maybe a combination between user-replacebale whites and programmable spectrum to control/vary how mixtures of color temperature. Like warm morning/evening, cool mid-day. I think I'd like this more than red/blue/white of the Eon.
I'm probably hijacking the OP's thread. But, definitely interested in seeing your light.
Regarding the advice to DIY, if someone put together a kit they'd make a fortune. A lot of us could do a kit, just not figure stuff out from scratch.