How many watts needed depends on a lot of different variables. Also remember, you will need different Kelvin CFLs for flowering if you plan to go CFL for the whole life of the plant. Mylar will help out tremendously with your yield and overall plant health. I highly recommend using it, especially with CFLs. With the low Lumens the CFLs provide you with you will need to make the most use out of your enclosure as possible. Keep it as confined as possible without causing fire hazards or otherwise having a negative affect to the plants health.

We need to know this information to help ya better:

∙ Dimensions of the grow space (LxWxH).
∙ How many plants you plan on growing.
∙ Will you be flowering with the CFLs?
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