For your bottom lighting, The Home Depot now sells 60 & 75 watt HPS units that simply plug into a regular outlet.

They are designed for outdoor lighting, so they have a plastic cover on them and all you need to do is wire it with a regular lamp electrical cord.

They cost around 60.00 but they work absolutely perfect. With as long as you have to flower, it might do you wise to pick up one or two.

These new lights, since the have a cover, wont burn or add much heat and they fit perfectly in the lower corners and stuff of grow closets...and are HPS. They also have the MH for outside in 70Watts and that would be even better for the lower foilage.

Looks good my friend.