ok thanks. I have a deep cycle battery and an invert er. hopefully that will work long enough. can I turn them on in intervals so no to drain the battery too low. I think I may get a few hours out of it. maybe I will go to harbor freight and buy their 100 700 watt generator. I have a large air, not an aquarium pump.hey thanks for the fast response. You the man! I am loving this DWC but didn't really account too much for this scenario. Hey would you mind helping me with some other questions that I have been trying to find answers to. I spent a good bit of cash to get to this point in my grow room design and cant afford to fail now. I grow just so I dont have to deal with shady people. Nothing gets sold. all personal use plus I supply my dad and one good friend. They will help with nutrient costs, bulb replacement and things like that. it ends up being a win win for all of us until something bad happens. If you can help out I will post my specs and a few pics. either way its all good. Thanks for the air pump tip! I would have thought more towards the lights.