HIGH EFFICIENCY - Enjoy 2000 lumens of crisp, quality lighting that is perfect for any atmosphere, brighter than your standard fluorescent tube lights, and equivalent to 100 lm/W of bright lighting. Provide more light to your shop, garage, office, supermarket, home, basement, or any fixture requiring 4 foot LED tube lights!UNIVERSAL INSTALL - A simple solution to your 4FT light fixture, each 4 FT LED bulb works with a 120V to 277v direct voltage connection (single end powered) or with most instant start ballasts. Check ballast list for compatibility.SAVE ENERGY - Cut your electricity usage by 43% when your replace your 32 watt t8 fluorescent light tubes with an 18 watt LED 4FT light bulbs. Immediately trim down the cost of your electricity bill by making the investment into energy saving LED tube bulbs.CONTINUOUS LIGHT - Built with an astounding 50,000 hours of lifetime which means no replacement will be needed for the next 45 years. Each t8 48 inch LED tube light lasts 3.8x longer than traditional 32 watt 4FT fluorescent bulbs.RELIABLE LIGHTING - Zero flickering light, zero delay, and zero worries with 48" LED tube that provides high quality indoor and outdoor lighting. Each tube bulb is quick to install, damp location rated, comes ETL listed for your safety, DLC qualified for state or nationwide rebate programs, and backed by a 3 YEAR WARRANTY.