These are the types of lamps commonly used for indoor growing:
1. Fluorescent Tubes
For beginners and lamps with moderate needs. Budget-priced and easy-to-use lamps.
2. CFL - Compact Fluorescent Lamps
Quite new kind of lamp. Highly efficient but quite sensitive.
3. HPS Bulbs with standard ballast
These bulbs are the most common. Excellent output for little money. Because of their need for a ballast the installation is more challenging but they are highly recommandable for most grower needs.