Discover the innovative Sunlite's PLD Plug-In By-Pass Light Bulb, designed for efficient light distribution and easy installation in tight spaces. With a life span of up to 50,000 hours each bulb puts out a bright 1025 lumens of light while only using 11 watts of electricity. Annual energy costs are a low $1.32 (Based on 3 hours/day at $0.11/kWh). This bulb has a 4-Pin G24q base allowing for an easy, secure fit into compatible fixtures. With multiple color temperature options you can choose between 3000K Warm White, 4000K Cool White and 5000K Daylight. UL Listed for damp location and for totally enclosed fixtures. They are also ROHS Certified, unlike fluorescent bulbs, they contain no harmful chemicals and do not require special handling or disposal.