Seedbare,

Yeah man... I know the tailights that you're talking about... Mercedes Benz have started using them for about 3-4 years (I think). And I've seen since about 2 years ago many retrofit bulbs made out of LEDs but for the normal bulbs' sockets. I've seen those especially in the tailights of public transport buses... they've replaced their normal bulbs with those LED paneled lights... And I've also seen them on traffic lights... Instead of that HUGE 10/12" incandescent bulb, now they've got a circular panel of LEDs... they look prettier...

Anyways, back to our point:
They make the different colors depending on the materials they use for the LED themselves. Those are n-type and p-type semiconductors with a special mix in the middle... when they vary different elements in that "special mix", they get different colors. Of course, they also color the plastic housings to 'give' more color to the, um, color.

I don't know if we're looking at the same eBay lights, but yeah, $$$ !!!

Your ratio of 2:1, I think, is right on. But we can by-pass that by using different bulbs: one for vegetative (blue) and one for flowering (red). That's why I picked the 90%/10% ratios on our hypothetical bulbs above. I would imagine that during flowering, the plants need at least some blue light... Same as during vegetative, the plants need some red light.

I don't know SeedBare... please keep on thinking about this. I'd really like to come up with some sort of 'bulb' specifications to send this company... They build the bulbs, we test them out.

Looking forward to you opinion SeedBare...

-turtle420