1 120 W CFL vs 2 60 W CFL

Which would be better for 2 Auto`s in a very small grow box. My friend has 2 strains under 4 T8. He`s thinking to switch to CFL during flowering period.
1 120W CFL or 2 60W CFL?

Probably two bulbs over one - you'll be able to move the two bulbs around the plant to direct the light where it's needed most.

Bottleandmobile said:

Which would be better for 2 Auto`s in a very small grow box. My friend has 2 strains under 4 T8. He`s thinking to switch to CFL during flowering period.
1 120W CFL or 2 60W CFL?

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Well, it depends on what kelvin they are, 6500k for veg or 2700k for flower, and for flower you're gona need alot more than 2 lights, like 7 to 10 would be ideal...and I mix the 65s and 27s for a fuller spectrum of light..

Deff go with the 2 60's, for veg do 5000k regardless what people say. In cfl 5000k is the sweet spot.

You lose lumens the bigger the bulb you get and they just aren't as useful. The 5000k 26w are the best bang for the buck.

You want around 100w per plant in veg and 2-3 times that in flowering, you can get away with less just wont be as vigorous.

Good luck man.

Thanks for the answers, one more question: Which will cause more heat 120W or 2 60W?

They will be about the same but the 2 60w will most likely run cooler.