To maximize indoor growing light you should consider an HPS-high pressure sodium or MH-metal halide bulb (both are HID or High Intensity Discarge bulbs). The metal halide bulb is for vegetative growth while the high pressure sodium is for flowering.

No matter what type of high pressure sodium, metal halide bulb or flourescent light bulb you need we have it, including such popular brands as Philips and Sylvania.  

Buy the correct light bulb and grow big plants today!