AZN...Did you switch to mylar yet? There is quite a bit of difference between mylar and foil's reflecting properties. I can't recall foil but I know mylar is 95%-97%. I am currently letting my 400 watt MH sit dormant because I am using the same light clamps as you have. I am using cfls for my mother plants to keep growing clones with. CFLs (compact flourescent lights) can be purchased an any discount store for a dollar each. Look for the actual watts(in small print) not the wattage that the bulb replaces. Idealy you want 50 watts per square foot. Length x Width of the floor in your grow space. 2 x 2 is 4 sqft and would require 200 watts. Remember when you switch to 12 hours of darkness you will need to have that closet door sealed to prevent light from the room penetrating in. Black plastic will work. Any leaks and your entire grow process will be fucked.
You have more help on this thread than I have seen in a while. You must have really good energy.
Remember to thank everybody and keep people informed on your progress to keep the help flowing in your direction.

Peace and Love bro -Jay