Dialing in my flower LED spectrum

Been using a 6 module LED (15/module) with the following combination to flower with great success but I'm now getting ready to order 3 or 4 larger units and wanted to tweak the spectrum slightly in each one to try and get the perfect ratio and compare results, as well as try an all white flowering mix. Any and all feedback from the LED guru's is appreciated;

Current Mix: (More 4000k then needed for flower?)
660 - 3
630 - 3
2700k - 4
4000k - 5

Proposed Mix's:

Light #1 (More WW)
660 - 3
630 - 3
2700k - 7
4000k - 2

Light #2 (is 4000k necessary to fill out the spectrum?)


Light #3 (All white)

If it were me, I'd actually cut out the 2700K and add a few more 4000K and 630/660s

Is this because the straight red makes the WW redundant and a NW that has higher levels of blue and green more beneficial to fill out the spectrum? I know green is important for penetration but was avoiding too much blue as i've come to understand that this can stretch out the bud when flowering. The current spectrum has produced really nice, trich rich buds but I was hoping to improve the density and yield if possible.

Glacius said:

Is this because the straight red makes the WW redundant and a NW that has higher levels of blue and green more beneficial to fill out the spectrum? I know green is important for penetration but was avoiding too much blue as i've come to understand that this can stretch out the bud when flowering. The current spectrum has produced really nice, trich rich buds but I was hoping to improve the density and yield if possible.

Click to expand...

Yeah, exactly where I was coming from. I feel like it would be a pretty well balanced spectrum. Not sure if it will help with the yield and density like you are looking for though...that might come from more powerful leds rather than spectrum.

Going from a 90x3w unit to a two or three unit, 180x3w/light setup so the power should be covered just trying to decide if i should stick with my tested spectrum. Was figuring to get one the same, one slightly tweaked and maybe one all white. Going to put three different strains (that i have experience with), one of the same under each light and figure out what mix yields the best. Or just get two of the 6 COB lights from Go Green LED that has popped up on here recently and be done with it lol.
Pic of a past grow with the current setup, works great. Buds seem to finish a bit airy, usually lighter than they look but that might just be the case with LED in that power range.