Light

ok,you can use them,but you are going to have some long,spiny plants with no real bulk to them,dont even waste your time.
 
lol i found some cfls but theyre all 13w

That's perfect. Probably 70 lm/W. most CFLS are under 65 lm/W, especially as wattage increases the efficency drops. Though more small bulbs will produce much more heat due to all the ballasts.
 
plant life has been shown to produce the best results with 3,000 lumens per square foot or more of light,any less will still produce results,just not what you may want.
 
sunlight is considered to burn at an average of 10,000 lumens per in the summer months.So try to get as close as you feasibly can.
 
so how many lumens per cubic feet?

Lumens are for humans. A bulb can have a very high amount of lumens and be very poor at growing plants.

Plants need specific frequencies of light to grow the best. This is measured in watts. So I use watts. Fluorescent bulbs designed for plants(Gro Lux, Plant/Aquarium, Blue/Red, etc.) actually have very low luminous efficacy, as little as 20-30 lm/W. But the plant-usable watts are much higher than other fluoros producing 90 lm/W.

13 watts of CFL is around 900 lumens. This is, again, the minimum suggested. Lumens are related to the wattage by lm/W (lumens per watt), and this is termed the luminous efficiency(or sometimes termed efficacy).
 
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