so im only growing one plant right now, and im gonna start flowering it with 2700 cfls i think. it is about 5 tall by 3 wide...the height is completely adjustable, the width could be too i imagine....i could make it happen....but how do i know how many lumens per sq foot i need so i can figure out how many lights i should have for flowering? the equation is confusing me
lumens per square foot calculation
- Thread starter Thread starter jcochran
- Start date Start date
B
bybliz
You need to tell us the inner width and depth dimensions of your box and also what wattage of bulbs you are using and how many lumen the manufacture claims they can put out.
M
madback
hey jcochran
I just flowered a couple big plants under cfl, and found that it was just a waste of time. I could have cut 100 clones and have my space filled to the max. Instead I flowered out 2 big ones, and found that big plants work great outside, but sea of green works best under cfl.
check this thread: http://www.icmag.com/ic/showthread.php?t=95963
I just flowered a couple big plants under cfl, and found that it was just a waste of time. I could have cut 100 clones and have my space filled to the max. Instead I flowered out 2 big ones, and found that big plants work great outside, but sea of green works best under cfl.
check this thread: http://www.icmag.com/ic/showthread.php?t=95963
PhenotypeX
Member
Alot of lumens
V
Voodoo
My personal rule is at least 1/2 of the wattage of what you need in HPS, more like 3/4 to be overly safe. That way you're never deficient. If someone recommends a 400 watt HPS as sufficient lighting, then roughly 250-350 watts of CFL will do in the same space. The benefit of course is that there is no need for heat ventilation. A 3X3 space should do just fine with 6 plants at 2 feet running about 12 26 watt CFLs. Don't push higher than 2 feet without lighting the bottoms of the plants, CFLs are only effective 4 inches from the bulb (in all directions)
This method does alright....
Ok, so the dimensions are 31x18x41. Is that too big for one plant? Also, I have no ventilation for heat, but do I need it? Because I hear that CFL's don't burn, so do I need vents? Also, I don't know anything about HPS or lights really yet, so how do I calculate how many lights I need for 1 plant? I'm planning on turning it to a mother I think...maybe bonsai....does it matter if lights are on top, sides or bottom? 4 inches from the plant, you say?
