Importance of 460nm red LEDs?

[RackitMan]

Anyway, I'm using about 20% 460 nm blue LED and the rest 660 nm red.

For the whole grow or just for flowering? I used strictly a 50w blue LED panel last year for veg, no red or white, and it worked very well for my two medium small plants which I found surprising.

How many watts of LED do you find necessary per square foot (I realize it depends greatly on the output and wattage of the LED) for a decent grow and which manufacturer/emitter wattage did you choose?

I see E-Bay has some 20w 630nm LEDs for $16 to $25 or I can buy some 10w 660-670nm emitters for $30 at Mouser. As this is strictly for my own small (2' X 2') grow, intital cash outlay is more important than optimal efficiency. Your thoughts on this?

RackitMan Reviewed by RackitMan on 03-31-2010. Importance of 460nm red LEDs? Here is something very confusing to me. Many LED proponents loudly proclaim the need for 460-470nm red LEDs over the cheaper 630nm LEDs. I understand that this better coincides with the accepted chlorophyll B absorption peak. So far so good. LEDs veg very well given appropriate wattage & color. So far so good. LEDs do not compare (generally) to HPS flowering as far as yield. (Please - let's not go off in that direction here. Thank you!) Rating: 5