Reveg. But recently suffered nute burn from hot soil. Has been through its second repotting. And just had to leach the snot out of it to fix said burn.
The strips are running off a cheap 24V power supply I picked up on Ebay for 20 bucks. A soon as this plant is finished I have another one in a Dutch bucket that's going in there:
Fusion and Wavy boards look good too! Bloody hell, I start a thread and open a can of worms for myself lol so many options I did not know would produce the goods!
You can always get some Samsung flexible strips 20w/m at about $6/m, no heat. I attach them to 1"x1/8" aluminum flat stock and they work great. There is an article on how to wire Samsung strips here ->http://ledgardener.com/samsung-lm561c-build-getting-started/ Same technique applies to flexible strips. 5 segments long about 4"x5 wired in parallel creates almost 200w. I mix 3500K with 5000k in equal amounts.
namaste
Single quantum board kit running at 100-120W, run autos, call it a day. It's a 5 minute build, under $200, and the 20/4 or 24/0 light schedule of an auto grow means you can use a smaller light for more hours and still have plenty. They are perfect for stealth grows.
Two would fit fine, a couple 135W kits and bobs yer uncle, but you seemed concerned about heat and stealth. No light source is running anywhere near ambient temps.
If you really need as little heat as possible and absolute stealth, autos are worth keeping an open mind about. Instead of 240W over 12 hours, you can give the ladies 120W over 24 hours, and pull 3-4 oz per plant of potent shit in 10-12 weeks from seed.
Anyway, good luck. No matter what you do, keep your expectations realistic as far as heat. 250W would be about perfect for photos in that space, but I'd run that exhaust out top to get the heat out quickly and cross your fingers.
Assuming you want to use that space as a 3' x 5' vertical scrog
I would buy
28x 2' EB strips 3000 or 3500k $280 au
3x elg-200-c700b $60 au/$180 au
or
4 x elg-200-c1050b $60 but ive only ran my strips at 700ma with them cool to touch after ages.. Others reported no need for any more than ally behind each strip for 1050 but I bet no sink would do the trick (some airflow would be enough),
3x 100k ohm linear potentiometer $2 - local electronics shop
3x 10k ohm resistor to prevent driver going under 10% $1 for 10
$30 of ally angle from hardware
Buy solid core wire to join strips, stranded wire to the drivers and for the dimmer.
2 x 12 strips vertically per 3'Wx2'H and at the top or bottom just position 4 strips horizontally centered. The fixture is made from ally angle, make a square with one support in the middle inline with a mounting point , riveted together so that all of the faces are level with each other (requires cutting/bending then riveting on the sides never the top)
That gives you about 433w @700ma with no heat sinks required, which is 29w/sf (enough IMO in that style/space and considering how close you can get them)