I've heard that hps isn't so good in veg. If I put the hps on a 12/12 timer, along with two flourescent tubes on 24/7, would that be okay for veg, or would the 12/12 hps stress the plant out somehow? (The flourescents are on the whole time, so the plant should stay in veg I think)

Also, what gives off a lot of heat, the ballast or the lamp? I'm asking this question because it gets hot sometimes in summer, and I'm a little worried about heat problems. If I have a fan on my babies 24/7, would that be okay for a 250 watt hps?

Finally, has anyone ever looked into putting a big block of dry ice in their growroom? I think it might cool off the room, and add valuable C02. I'm not sure how expensive dry ice is though.
EpicOfMan Reviewed by EpicOfMan on . First timer, wanna know if this will work (I'm a cheapo) Ok, so I love to smoke, and I don't live at home, but I have roommates in a mutually rented house. I'm going to set up a grow operation in my own room, and I'm planning on growing just two plants for personal use. Now, I'd like to do this correctly, but also as cheap as possible. My plan is to get a cheap 250 watt hps from inside sun, and order some seeds from Hemp Depot. For the veg phase, I was going to buy four "cool white" flourescent lights from my local store. They are 37 watt, Rating: 5