Have your lights on 12/ 12 overnight. It will help with the heat issue having the ballast off during the hotter parts of the day. It will also help with the cost if you are on time of day pricing. Find a little cabinet somewhere else in your house. (I use an old microwave stand that has a big cabinet in it.) Put a couple cfls in it. Get a little usb fan and have it running in there. Let your clippings grow so that when you harvest, you can transplant into bigger pots, and within 2 weeks be flowering for the next harvest. Or..... keep the seedlings under the 12 hour light and wake them up in a window or spare room for a couple hours during the day and it will be enough to keep them out of flower. You need to do this or you will only have one good harvest off your seeds. The alternative is to reveg your plants after flowering and then don't worry about cloning at all.