27W (250 Watt Equivalent) A21 Dimmable LED Light Bulbs, 4000 Lumens, 5000K Daylight, 270 degree Omni-directional, E26 Medium Screw Base LED Floodlight Bulb, 5-Year Warranty, SANSI (2 Pack)Category: 250 Watt Bt28 Mogul Base27W (250 Watt Equivalent) A21 Dimmable LED Light Bulbs, 3500 Lumens, 5000K Daylight, 270 Omni-directional, E26 Medium Screw Base LED Floodlight Bulb, 5-Year Warranty, SANSI (2 Pack)Long lifetime and 5 years warranty: Long lifespan: 25,000 hours VS 1,000 hours ( for CFL bulbs) 5-Year Warranty: you can sure buy with confidence, any problems please feel free to contact us. Wide Applications: A21 shape with E26 base, easy to install Ideal for home, kitchen, garage, warehouse, basement, mall, barn, office, school, hospital, shopping mall, workshop, logistic center, stadium, hotel, church, studio, GYM etc. Dimmers recommendation: To ensure a better dimming experience, the following compatible dimmers are recommended: For general lighting: *LUTRON DVCL-153P-WH, LUTRON MACL-153M-WH *LUTRON MAW600H-WH, LUTRON TGCL-153PH-WH *LUTRON S-600P-WH, LUTRON DVW600PH-WH *LUTRON TG-600PH-IV, LUTRON DVWCL-153PH-WH *LUTRON SCL-153P-WH, LEVITON IPL06-10Z *LEVITON 6674-P0W, LEVITON 6602-IW *PASS & SEYMOUR T600WV, WEMO Wi-Fi Light Switch For desk lamp or flood lamp: *LUTRON TT-300H-WH, LUTRON TT-300NLH-WH *LUTRON TTCL-100H-WH, LEVITON TBL03-10E Notice: This 250watt LED bulb only works with TRIAC dimmer. Zigbee and dimmers are incompatible for they may cause flicker or slight buzz when using. SANSI Advantages--patented ceramic heat dissipation technology(CHDT) Sansi Ceramic LEDs VS Aluminum LEDs Dissipates heat more efficiently: Unlike other LEDs, whose chips must be molded on a PC board with a thermal adhesive, Sansi LEDs save this by molding chips directly on the ceramic. Fewer pieces mean better cooling efficiency, thus better heat dissipation. More corrosive-resistant : ceramic deals with moisture and air pollution better than aluminum Customer Notice: 1. Please turn off power before installing or changing assembly parts. 2. Ideal for both indoor and protected outdoor fixtures. 3. Forbidden to use in enclosed fixtures.