That light is a halogen, never a good idea, creates an amazing amount of heat. I would suggest buying an envirolight or any horticultural CFL. Stealth hydroponics has good high powered CFL's that use a traditional bulb sockets. If your growing in a computer case/tower I would buy one a little on the larger side, most people who grow in those use cases slightly larger then the usual home PC. I would also install as many computer fans as posable, good ventilation is key. To keep the hight down you can buy Humboldt County's Own Bushmaster, it will keep them small and compact, it's even offered with the commercially made PC Grow cases. A small DWC hydroponics system in the bottom is what is usually used in most, it's dirt cheap, VERY simple, gives you great results and gives you more space then with soil. I'm helping my friend build one as we speak, thats what we are doing.