T5 10,000k vs 6500k

GodSlave

GodSlave

Active Member
Hello all,
I was getting ready to buy some replacement T5 bulbs, and I noticed they had these Agromax super daylight 10,000k spectrum lights. What do you think, 10,000k or 6500k? Obviously the 10k is going to be more blue, but I'm wondering if it's TOO much blue, because typically I've only seen the 10,000k spectrum used in aquariums.
They will be used for veg only.

Thanks in advance,
GS
 
some0kid

some0kid

Active Member
10,000k is meant for aquariums because it's a "cooler" form of light. It supports good sea life, corals, algaes etc. (Think of light underwater being cooler xP). Plants aren't under water, so they prefer a warmer spectrum (6500k). I can't personally say that a T5 6500k bulb with the same wattage as a T5 10,000k bulb would grow it any better, but based on this information I'd buy the 6500k before I bought the 10k.
 
GodSlave

GodSlave

Active Member
some0kid said:
10,000k is meant for aquariums because it's a "cooler" form of light. It supports good sea life, corals, algaes etc. (Think of light underwater being cooler xP). Plants aren't under water, so they prefer a warmer spectrum (6500k). I can't personally say that a T5 6500k bulb with the same wattage as a T5 10,000k bulb would grow it any better, but based on this information I'd buy the 6500k before I bought the 10k.
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Ya, kinda what I was thinking. The only thing that had me wondering is because they are Agromax lights, and they are billed as "super daylight".
Thanks for the thoughts!
Anyone else?
GS
 
sso

sso

Well-Known Member
blue light travels further in water, plants in water dont receive that much red, if any.

corals only use blue light. freshwater plants can use red though, but mostly if they are semiaquatic.

on that note, i notice that plants grown with more red have stronger stems and leaves, while underwater plants dont really need that.
but id be curious about the spectrum of those 10 000k, they might be better, 6500k often has a bunch of green in it, often the biggest spike.

might be better using 10 000k bulbs supplemented with 2700k if there is less green and more usable blue in them (plus more uv)
ya´d have to do the research yourself though :)
 
GodSlave

GodSlave

Active Member
sso said:
blue light travels further in water, plants in water dont receive that much red, if any.

corals only use blue light. freshwater plants can use red though, but mostly if they are semiaquatic.

on that note, i notice that plants grown with more red have stronger stems and leaves, while underwater plants dont really need that.
but id be curious about the spectrum of those 10 000k, they might be better, 6500k often has a bunch of green in it, often the biggest spike.

might be better using 10 000k bulbs supplemented with 2700k if there is less green and more usable blue in them (plus more uv)
ya´d have to do the research yourself though :)
Click to expand...
Thanks for that bro, I was actually thinking about doing both 10,000k and 2700k. The fixture is a 4 light bank, so I was thinking of doing 2 each.
Thanks for the input!

AltarNation said:
GS: have you checked out Pr0ffeseur's thread on T5 bulbs? It's got some really interesting food for thought regarding temperature ranges.


Link incase you haven't seen it:
https://www.rollitup.org/indoor-growing/358190-led-without-leds-my-first.html
Click to expand...
Thanks for that link, gonna go do some reading now! Wholey crap that is a long thread lol
 
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