i am doing an experiment on the light spectrum and this is why-
"As you mentioned, you have several lighting systems to choose from, including compact fluorescents and high pressure sodium (HPS) lamps. Among HPS lamps you have a choice between a single 100-watt lamp which uses a total of about 120-watts and emits about 8,800 lumens(73 lumens per watt) or a 150-watt lamp, which uses about 180 watts and emits almost double that-15,800 lumens (87 lumens per watt).
A 42-watt compact fluorescent (CFL) emits about 2700 lumens(64 lumens per watt). Four 42 watt CFLs use 168 watts and emit 10,800 lumens. Other size CFLs have a similar efficiency.
However, that is only part of the story. Plants use mostly red and blue light. Yellow and green light is of little use to them, so light that is emitted in these spectrums is wasted energy. Most of the light emitted by HPS lamps is in the yellow spectrum. Only a small amount of the emitted light is in the orange or red spectrums, which plants use efficiently. Warm white fluorescents (2700 Kelvin) emit a greater portion in the red and orange sectors.
Although fluorescents produce only about 75% of the light per watt that the HPS does, the amount of light usable by the plant is equal or probably higher with the fluorescents. You may wish to experiment to see if adding a single cool white CFL to replace one warm white results in shorter, stouter stems and more vigorous growth. The reasoning is that warm whites don't emit much blue light, which the plants use for photosynthesis and to regulate their growth. The cool white bulb supplies the blue light.
My call for your unit would be to use several (three to five) CFLs with a total input of between 120-160 watts. Although the 150 watt HPS is a bit more efficient that the CFLs in total output, watt for watt the fluorescents provide as much useful light as the HPS lamp. Heat is another consideration. The HPS runs much hotter and emits more heat than the flourescents. "
http://www.420magazine.com/forums/plant-bud-photos/107756-final-product-grown-cfls-only.html here is some bud grown with cfl's i was surprised...i think the movement of cfls is on a quick rising. look at all the groups that are dedicated solely to cfls. im just giving advice to those who ARE using cfls.
with flos the key is to keep them as low and tight as possible. The lumen output is very low compared to an hid lamp. So the higher you go with the light the more space you have that wont get nearly enough lumens towards the bottom. Id say start tying down all of your branches which will do two things. It will strengthen your branchs/plant and it will keep her low to absorb more lumens. No reason to stretch them out and waste a bunch of open space down low. Keep it low and fill out your grow space by tying them down.
