Led light question

these distinctions are silly. if the plant can handle more light over hours of operation, then you should use both. while there are statisticalyl significant things associated with various wavelengths of light, the more important thing is the total light given, by far. more red should cause 'taller' plants. blue should promote bushier plants, but that is all relative to genetics of the plant. a bushy pheno will not become a crazy stretcher just because the light given is slightly more red. it's a very small effect relative to the plant's potential as dictated by its genetics. if you are growign photoperiods, you need 150% more light over 12 hours to match what you gave over 18 hours. (assumes 18/6 vege cycle) DLI is what matters. it is proportional to hours of use as you can see... now if the 'bloom light' adds roughly that much, then it would work well by coincidence to turn on after flipping to 12/12. wouldn't need to move the light closer or add more light etc... so, use both if it doesn't burn anything. if the plant can handle more over 18h, then it can probably handle more than you gave over 12 hours previously too. read up on dli and this stuff becomes more clear. number of photons absorbed per day is the key.. the rate at which it is applied requires different number of hours per day to reach the same DLI 9 photons/s for 12 hours and 6 photons/s for 18 are the same DLI. 6x18 = 9x12 = 108 -- this is simplifed and number of photons per second are 1.0x10^17 scale photons per second... possibly thousands of that. so 10^20 scale and that's per second let alone that multiplied by x 60sec x 60min x 24hours

Veg for veg and both veg and flower together for flowering.

Veg one In vegging. Then both on in flowering