3000k flouresent bulbs?

rexx890

Member
I am using (6) 32 watt 6500k t8 bulbs in the fixtures I have for veg. they have 3000k bulbs in t8 would this be ok to flower with? I could get 2700k bulbs for them but they are really expensive and can only buy them by the case.
 

Humanrob

Well-Known Member
I'm interested to see what responses you get, I'm really curious about this too. I've read a lot of conflicting information in regards to light spectrums. Mostly its some people saying you *must* use a specific kelvin, and then on another thread I'll see pics of an awesome crop and they were using exactly what everyone said would not work… it makes it hard to know just how important it is.

I was just reading in the LED section where someone said in response to another members question, that it would be OK to run both veg and flower with just 3000k. I suppose its not optimal, but apparently it will "work". Just how much of a negative impact deviating that degree from "optimal" would have -- I'm guessing that might be hard to quantify.
 

topcat

Well-Known Member
I'm an outdoor grower who's recently come back to fluorescent indoor growing after 25 years away, so I'm no expert. My conclusion is there's little difference between 2700 and 3000, I consider any lamp in that range a "flower" temperature. Just my opinion. I'm using two thirds 6500k for veg and 3000k for flower.
 

SPLFreak808

Well-Known Member
Pretty sure you can use that with a few 2700k's. Idk if flowering would be optimal, i have read in a post somewhere that if using cfl's in flower, make sure far red(2700k) is the last color spectrum the plants see before the lights go out for optimal bud production. 3000k is quite close, but i also remember them talking about far red promoting buds better then just red. I have never tried any of these theories myself. But i damn sure believe it.

I also remember reading somewhere that 6500 and 2700 is one of the ways a plant can tell seasons because 3000k-5500k is a gap that the plant recognizes as a changing season.
 
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