I'm thinking of doing this:
with t5 2' 8bulb
veg 18hrs
4x460nm (aquarium blue)
4x6500k (grow)
bloom 12hrs (maybe 16 or 14)
4x420nm (aquarium violet)
4x3000k (bloom)
if you take a look both bulbs i want to use for grow, they are high in the chlorophyll B response range
likewise both bulbs i want to use for bloom are high in the chlorophyll A range
i think i might be on to something
the aquarium bulbs complement the spectrum that already exists in the 380-500 range on the regular bulbs. 3000 and 6500 has been historically used for bloom and grow respectively. 3000 is tuned to chlorophyll A and 6500 is tuned to chlorophyll B. since the spectrum is choppy i'm using the aquarium bulbs to fill in the spectrum. i'm using both regular and aquarium since the aquarium bulbs have no reds which plants need to grow vertically, or so i think, we'll see. this will be under a 2'x2' ebb and flow with 5ml B.C. Boost 5ml B.C. Bloom 1g epsom salt per gallon. i'll be running beans (yes actual pinto) to make sure this thing works. this is all in a 4x4 tent with 176ish cmf exhaust & box fan. i got the tent turned upside down so the exhaust holes are on the top, i like it better that way. PICS... SOON
credit: all this comes from watching a video on this thread of someone getting the best growth i've seen with 420nm 3000k
some good ones on Youtube i found
[video=youtube;M7Y4-WF0FFg]http://www.youtube.com/watch?v=M7Y4-WF0FFg[/video]