There are 3 types of pool lights. Halogen and Incandescent are the more traditional standard light bulbs and LED bulbs are the latest type which last longer and are more energy efficient.
Here are some of the models we carry:
Halogen – Pentair AquaLight, Sta-Rite Sunbrite
Incandescent – Feit R20, Pentair SpaBrite and Amerlite, Sta-Rite SwimQuip and SunLite
LED – Pentair Intellibrite