Haha... check some info before you go. I'll edit once I post this. Waiiiiiiiit!!

Edit: Ok... now that I have your attention. Before you go to the store, come back, and post a thread asking if some new bulb will work... let us help :jointsmile:

What kind of space are you growing in? How many plants? Give us as much info as you have. Type of ventilation/exhaust... also what type of local climate you are expecting for the grow cycle. Oh and budget is a good one too.

With this info, and personal research... you can really pinpoint the type of lighting that would work best for you. There are a few options:
Compact Flourescent Lightbulbs = CFL
High Intensity Discharge = Metal Halide & High Pressure Sodium
or if you have some money and desire to experiment, possibly LED's.
- I can't think of any other types of lights :stoned:

By giving additional info... people with experience can guide you towards finding the most appropriate lighting set-up for your space.