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I got this one. Whats a CFL. Very confused about lights. Whats does it provide for a plant that normal bulbs dont?
Sorry im new to growing with lights and all.
CFL is compact flourescent which is what those are, most if not all of the spiraly lights are CFLs. Those are 9 watt - 40 watt equivalents. I would reccomend the 23 or 26 watt lights that give off 100 watt equivelant, because you would need less of those than the ones you posted.
You probably shouldn't have edited out your original post to take out the old bulb and put the new bulb in there. You've got replies afterwards saying you can't use those bulbs for growing cannabis and that they'll produce too much heat and not enough of the light spectrum it needs, but they were referring to incandescent bulbs and not the CFL's you now put in there. Talk about confusing the matter.
The fluorescents provide more of the sections of the light spectrum that the plants use in photosynthesis. Incandescent lights, beyond inefficiently producing a lot of heat for the amount of light they produce, give off mostly yellow light, which the plants essentially just don't use. Cannabis will use more of the blue spectrum during vegetative state, and more of the red spectrum during flowering. CFL's are capable of providing more for these needs because there are two different color bulbs you can get. For vegetative state, you'll want the "daylight" bulbs, with a color temperature around 6500k, and for flowering, you'll want the "cool white" bulbs, which have a color temperature around 2700k.
Since CFL's don't produce a lot of heat, they can be positioned close to the plants, which increases the amount of light the plants can use (since, at greater distances, there is less light). Which color of CFL's did you get? What is the listed amount of lumens for each bulb?
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