What's more efficient?

Nightmarecreature

Active Member
I need more veg light for my plants. I'm going to get another tent a 4.5 X 6 for my plants. I will be putting about 20 mini moms in there. What puts out more lumens? Two T5 4 foot 4 bulb or one T5 4 foot 8 bulb? The Hydrofarm T5 4bulb puts out 20k lumens and the other puts out 40k lumens. Anyone running two 4 bulb instead?
 
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