Lose the 100W incandescents. Worthless.

Get more flourescents...I would say 3 more sets of two.

Just line the plants up like you have them, but have a canopy of flourescent lights on top.

Put a fan on the end where you desk lamps WERE, and blow the fan straight across the long length of the lights.

Future issues to deal with will be smell.

But we'll deal with that later.

good luck.