REALSTYLES
Well-Known Member
Lol I just ordered some CXA 3590 6500k BD's from Kingbrite for my veg and mom tent.
Is 6500k Cree CXA3590 too blue?
- Thread starter REALSTYLES
- Start date
churchhaze
Well-Known Member
1 pound.
bicit
Well-Known Member
per watt
ttystikk
Well-Known Member
Run it and tell us!
CaliWorthington
Well-Known Member
bump. How did the 6500k work out?
I'm about to order 15 DB's from Kingbrite, for mother plants. They're currently under an onyx grow, which is 6500k. I tire of the fan noise, this will be a passive build.
Supra said
I'm about to order 15 DB's from Kingbrite, for mother plants. They're currently under an onyx grow, which is 6500k. I tire of the fan noise, this will be a passive build.
Supra said
Any guess as to how much lower than 5000k? I'm shooting for over 500 PPFD in a 4.9' x 4.9' tent. DIY calculator says (12) 3590 5000k @ 1.05 mA will do. I'm thinking 15 though. More light, better spread, can be dimmed.
Airwalker16
Well-Known Member
Probably not a ton since the bins so much higer?
"Supra said
Since the 6500 is higher in blue, and blue photons require more energy to emit, there will be less photons per PAR W (a lower PPF)."
I don't think a 6500K LED would require more energy, since LED's actually produce blue light and use phosphors to affect luminescent down conversion into lesser energetic warmer white blends.
Perhaps the phosphorescent conversion takes a single higher energy photon and emits a greater number of lower energy photons? I'm not familiar enough with the physics behind this.
Since the 6500 is higher in blue, and blue photons require more energy to emit, there will be less photons per PAR W (a lower PPF)."
I don't think a 6500K LED would require more energy, since LED's actually produce blue light and use phosphors to affect luminescent down conversion into lesser energetic warmer white blends.
Perhaps the phosphorescent conversion takes a single higher energy photon and emits a greater number of lower energy photons? I'm not familiar enough with the physics behind this.
CaliWorthington
Well-Known Member
Yes that's the plan.
REALSTYLES
Well-Known Member
Like a charm for veg haven't tried flower yet
bicit
Well-Known Member
So it works, but how does it work compared to other CCT's? Any noticeable growth differences in plant development under 6500k vs 3000k or 5000k? Any better or worse than lower temp cobs?
CaliWorthington
Well-Known Member
Thanks for the reply @REALSTYLES
I've seen comparisons between 5000k and 6500k fluorescent where the 6500k won. My moms are currently under all 6500k LED and it works great. They need more light and space though, thus the new tent and DIY build.
Running 18 3590 @ 0.7mA is where the monthly electrical savings really kick in. I could get the same 550 PPFD with (12) @ 1.05mA though. Or (15) @ 1.05 mA would give a lot higher PPFD (around 675) and could be dimmed. The problem with running only 12 is not enough spread, so I'm leaning towards the 15 or 18 COB builds.
I've seen comparisons between 5000k and 6500k fluorescent where the 6500k won. My moms are currently under all 6500k LED and it works great. They need more light and space though, thus the new tent and DIY build.
Running 18 3590 @ 0.7mA is where the monthly electrical savings really kick in. I could get the same 550 PPFD with (12) @ 1.05mA though. Or (15) @ 1.05 mA would give a lot higher PPFD (around 675) and could be dimmed. The problem with running only 12 is not enough spread, so I'm leaning towards the 15 or 18 COB builds.
REALSTYLES
Well-Known Member
Yes I see tighter internodes when vegging under them than I do the 5000k