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I just upgraded to the Lumatek 250w switchable ballast. Sorry I wasted so much money on magnetic ballasts in the past. The Lumatek acutally squeezes additional lumens out of both the metal halide and high pressure sodium bulbs. For the amount of space you have, 250w should be enough.

I'd highly recommend making a DIY cool tube. I also had major heat problems in my 2' x 4' closet grow until I went with the cool tube. Now I'm running a double cool tube (two 250w) and my tempuratures average in the low to mid 70s. A bake-a-round and some 4" PVC drain pipe fittings makes a...

Just thought I'd respond about the temperature using the double cool tube. My temperatures range betwee 68 and 73 degrees without using my noisy intake fan. My Aurora Indica seedlings seem to be loving it.

Thought I'd share some more pictures of my contraption installed in the closet. I'm germing some Aurora Indica now for the first trial run.

Hi SmokinErb, I figure the problem with the in-line configuration is that one bulb will always run hotter than the other because the first bulb heats the air considerably. You are right, though: the airflow is cut in half over each bulb. I've been using one 400w bulb in a homemade cool...

Thanks for the advice, Alex--you just saved me a bundle of money. Two 250w lights makes sense. + rep I'm finally happy with my screen for the scrog. I'm using 3" x 3" grid used for display racks in stores. Gives plenty of room for colas.

Thanks for the compliments. I'm thinking about running 400w lights through switchable ballasts. Overkill for a 2' x 4' scrog? I'll post more pics as the project develops.

I've got a hole in the ceiling leading to a 4" fan hanging from a rafter in the attic. The other end will connect to a carbon filter in the closet. Been using this system with my single DIY cool tube.

I decided to upgrade my closet grow by installing two cool tube lights instead of the single one I now have. I thought I'd try to come up with the tubes running on parallel vent lines--instead of in line with each other. My closet is only 2' deep so the size of the contraption was critical. This...

Thanks--that's what I was thinking. Glad you confirmed.

I've been using a 400w home-made cool tube to illuminate my scrog that is four feet wide by two feet deep. I'm thinking of getting two 250w switchable ballasts and building some sort of double cool tube. My question is: what position and orientation of the two lights will give the best light...

Thanks, Riddleme. I figure it's worth a gamble.

I'm trying to decide what to grow next in my closet. I've got some nice fem seeds from Nirvana but I had a crop from some bag seed of purple kush. Every seed produced a hermie but the smoke was absolutely some of the sweetest-tasting weed I have ever smoked. It smells like insense and has a...

I got some White Widow from BC Bud Depot some time ago. Took forever to arrive. Switched my business to Nirvana. The widow that I grew yielded fluffy buds and is the most potent weed I've grown. Frankly, I'm not crazy about it as it always gives me a cannabis hangover (groggy all day the...

I just switched to fem seeds. Got some fem Papaya from Nirvana so I could try doing a Screen of Green without having to hassle with clones. Due to legal restrictions, I like the idea of never having more than five plants at a time. You can't do that with regular seeds or clones. I plan to...

I thought so--thanks for the feedback.

Hello All, I have grown four crops using a Baby Bloomer ebb & flow system, which has 10 five-inch pots in it. This time I bought feminized seeds and plan to do a scrog. Since I won't have to weed out any males, can I not use the pots and just fill the tray with hydroton? It seems to me...

Thanks for the input guys. I think I'll split the harvest 'cause it is yummy bud as it is and I've always wanted to make some hash. Wouldn't waste seedless bud on making hash. Thought I'd toss a few ozs in with the trim.

I learned a lesson about bag seed: got 6 seeds from a quarter of purple kush. They all grew into some real healthy hermies. (Ah sh*t!) So, I now have a few ozs of some of the seediest weed I've ever seen. The bud is delicious but the seeds are a PITA. I'm considering turning a good portion...

I'm on my third grow and have had identical problems at about the same stage of growth--usually on only one or two out of six or eight plants. Never found out the problem but all of the plants did very well after this phase. Sounds like you have good nutes, pH, water, and temps. There's not...