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Is there any equivalent formula for growing with CFL's?

Then how do you figure out how what wattage of light to use, or how many lights to use?

Yeah, you want to measure lumens, since wattage varies wildly depending on the type of bulb. Aim for 7-10,000 lumens per square foot. This thead has a lot of good info about how much light you need and how much you get out of different types of bulbs.

Cool, thanks blaze. Sounds like I'll be making a trip to the aquarium supply store in a couple months.

She's looking good! I bought all my ducting supplies at Home Depot today. Hope it's enough to keep my grow cool.

I'm going to make it easy on myself and just go with a cheap inline duct fan for the exhaust, passive intake, and a small oscillating fan near the intake hole to help draw the air in. Hopefully a little thing like that won't be too noisy. Since I'm going to use 4" ducting, I'll probably just...

'Cause I'm impatient. :mrgreen:

Ah, yes, burning down the house. I keep freaking out about that, even though it's just some light bulbs on a timer, nothing particularly dangerous. Just need to make sure I wire them up right...:idea: phyzix, I def. want to get an HID setup, probably by my second or third grow. Just not ready...

I've been studying up and getting ready to start my first grow, but it seems I'll be going on a week-long vacation around the second week of July. I was planning on growing the seeds I've saved from my usual smoke - they're free, so I don't care if I completely screw up my first grow. I'm...

I'm glad I found this thread! I'm going to be starting my first grow as soon as I build my setup. I scored a good deal on a metal wardrobe off Craigslist, similar dimensions to yours except taller. What did you use to cut holes for the intake and exhaust?