As the tittle says , I'm about to replace my 600w HPS with 12 CXB3590 powered by 2x HLG-320H-C1400B. I'm going to put the COBs on passive heatsinks. They arrived today and I'm still waiting for a friend to the aluminium panels to start wiring. Someone told me that I'm going to have bleaching problems cause my tent is too small. It's 1x1 meters , any advices ?
From 600w HPS to 600w CXB3590
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GroErr
Well-Known Member
Yeah, half the wattage (actually 400w would be great) or get another tent. 600w of 3590's can cover twice that space easily if it's spread/spaced well. Here's a pic I just posted on my thread. That's ~3' x 8' of flowering plants at different stages, under 12x 3590's @1400ma.
The good thing is that the drivers are dimable.
Any idea about what ppfd I'm getting with my setup ?
freemanjack
Well-Known Member
Got 600w of luxeons in a 1200mm x 800mm space, can drop em down to about 6" from the canopy with only slight yellowing which disappears once the plants harden up to such a big light source, and we are only using 8 cob's so our local intensity will be far higher than yours near the cob's. You might want to ease your girls in slowly if they are used to hps, the switch can cause shock, just start real dim and increase each day for a few days.
Danielson999
Well-Known Member
I think it's alittle over 1600ppfd in a 3'x3' running at 1400ma.
VegasWinner
Well-Known Member
8- 3590's @1400ma is like 1100 ppfd. You are twice that. Replacing watt to watt is not the best way yo go. I would go with 8 first.
Airwalker16
Well-Known Member
HE CAN DIM
GroErr
Well-Known Member
No but someone posted ~1600 in a 3x3 which sounds about right and is overkill in that space imo, you could dim them if you have any plans to expand out that footprint later but that depends on how you spread them out.
End of story lol
Danielson999
Well-Known Member
He can also save himself a load of cash and do things properly and efficiently. Throwing in twice as many cobs as he needs just because 'he can dim' doesn't make it a wise choice.
Olive Drab Green
Well-Known Member
I use 2 CXB3590 3500k top bin emitters with their own 2150mA driver each in a 4x2, together. I could probably do more than the two plants and 6 San Pedro cacti I'm doing now.
GroErr
Well-Known Member
You can get great production with low w/sq./ft. I've been running them at ~25w/sq. foot and they produced very well.
Olive Drab Green
Well-Known Member
Very nice.
jeepster1993
Well-Known Member
I run 320 watts on 6 cobs in my 3x3.
Went from 400 watts HPS down to 320 LED and am doing well.
Went from 400 watts HPS down to 320 LED and am doing well.
Right! Wasn't thinking on cash...
VegasWinner
Well-Known Member
Now that you have them build two lights and be twice as happy.
PerroVerde
Well-Known Member
I replaced a 600 hps in a one meter tent with 8 CXB 3590's at 50 watts each. The 400 watts of cobs have out preformed the 600 watts of hps by far in quality and quantity...
I think you could replace a moral based 1000 watt hps with 600 wats of CXB's... 
REALSTYLES
Well-Known Member
Well here's 4400w of CXB3590 in action 4-500w and 4-600w lights lol