GE, 1PK, LED7ET5G-21-3CC-LT. 8WT5 bulb that replaces a F13T5 21" fluorescent bulb. Features 3 color options that you control: 4000K, 5000K, and 6500K. Works with T5 electronic ballasts. Non-dimmable and lumen output is 800. Rated life is 36000 hours. MOL: 21". CEC compliant.