FEIT Electric 500-Watt Universal Pool & Spa LightThis Feit Electric 500 Watt Incandescent R40 120 130 Volt Pool and Spa Flood Light Bulb will provide an average of 2,000 life hours of use. These pool light bulbs are safe for use in both indoor and outdoor lighting projects, but are engineered specifically for use in pools and spas. They work with most above ground and in ground pool and spa lightings. The dimming capability of the spa and pool light bulbs offers a variety of lighting options.