Well, I have one switchable that currently has a MH bulb in it, and as it turns out I think the other ballast is switch-able as well. To be honest with you I never even opened the thing prior to last night. When I saw HPS written on the top I assumed it was only HPS, but then I see a switch at the bottom. So, I think I am okay. With reguards to ventlation I only have a closed circuit set up, that is pulling cool air from outside, through the lights and pushing it into the attic. I hope to buy a carbon filter real shortly and set up the ventilation for the room itself. But in the meantime if I was going to start flowering in the next few days, I could always just make it an open circuit that will bring fresh air into the room. This way I could close off the entire room, so they get complete darkness when the dark cycle is on. For now we keep the door open during the day to get fresh air in there, obviously that won't work during flowering. Then the hoods would not be air cooled (only for a few days until I can afford other things I need) so they would need to be a little higher than they are now. Do you guys think this is my best option? I plan to veg for a few days once they get transplanted, but unfortunately I won't be able to afford the carbon filter *j8st* yet. So this was my idea for a possible solution that can buy me a little time.

P.S Cruz, I sent you an email. Don't plan to veg for even another full week after the transplant, they are getting big real quick, I don't want monsters on my hands for my first time! Adios!