6 x CXB3590 - how high should I turn them up?
- Thread starter yosim
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- cree cxb3590 dimming
sixstring2112
Well-Known Member
how far away from the plants are the cobs?
jeepster1993
Well-Known Member
I'm running 5 3590's in a 2 x2.5 tent. 250 watts total.
During grow, I keep the light about 2 feet from the plants and dimmed to about 75% total output.
During flower, I turn the light to full and move it down closer to the plants, about 18 inches.
During grow, I keep the light about 2 feet from the plants and dimmed to about 75% total output.
During flower, I turn the light to full and move it down closer to the plants, about 18 inches.
Airwalker16
Well-Known Member
You turn it up and see if you get any bleaching. 1400mA is only 50watts.
Id rather avoid bleaching before it happens! how to know if bleaching is occurring? i havent started the grow yet, just preparing
thanks
Airwalker16
Well-Known Member
Youll know. Keep em 18"+ away and you'll be fine.
thought that was heat stress?
sixstring2112
Well-Known Member
this is the best advice you have here. i have seen growmau5 and others run as close as 2 or 3 inches but that was 700ma not the 1400 you have.so if you dim yours to 50% you can run them very close in both veg and flower.i have my 1050ma cobs @ 18 inches above the tops and running at 100% and im getting plenty of light down low.pushing them until they bleach is terrible advice lol.
ive got plenty of vertical height so i can keep them back a good bit - no way would i run them a few inches away, i tried that with my Mars light but its just way too close
thanks
jeepster1993
Well-Known Member
The LED is a strong enough light to do the plants harm, not heat harm but light harm. You want that NOT to happen, the happier the grow, the happier the grower.
I've got as close as a foot away, but any closer is too close. I was told you will get foxtails if the buds get heat/light stressed. I don't want foxtails...
My tent. Also the led is turned down a bit.
sixstring2112
Well-Known Member
lookin good jeeps,you see there the plants are nice and short/fat and his lights are not crowding the plants.everything looks nice n green.The LED is a strong enough light to do the plants harm, not heat harm but light harm. You want that NOT to happen, the happier the grow, the happier the grower.
I've got as close as a foot away, but any closer is too close. I was told you will get foxtails if the buds get heat/light stressed. I don't want foxtails...
My tent. Also the led is turned down a bit.
CobKits
Well-Known Member
which is usually caused by being too close to a light
loftygoals
Well-Known Member
50w at 2 inches will burn the tops but at 6 inches will be fine.
I haven't got any first hand experience with lower wattages and plants being close to lights but I'd have thought 20w might be ok at 2 inches.
I haven't got any first hand experience with lower wattages and plants being close to lights but I'd have thought 20w might be ok at 2 inches.
sixstring2112
Well-Known Member
well theres alot that goes into light distance.i mean i run 600hps @ 4 to 6 inches from the canopy but my lights move.plus if your feeds and enviro are spot on you could get away with running cobs really close.but you will def lose coverage running cobs too close to plants and waste alot of photons imo.