Always use 42 watt CFLs (150 watt equiveant).

Keep the bulbs 1 inch or less from your foliage... even slight burn from CFL is worth KEEPING THEM CLOSE!

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Garden Knowm Reviewed by Garden Knowm on . Does 2 bulbs @ 2000 lumans each...... give me total lumans of 4000? Or does it stay at 2000 regardless of the number of bulbs? Maybe a silly question, but I have read KP's Cannabis College and I still don't have an understanding. Thanks guys, Randy Rating: 5