FiveStar Lights T8 4Ft LED Light Tube20W(60W equivalent), 6000K Daylight, ETL Listed, 2300 Lumen Energy Saving Fluorescent Tube Replacement,Dual-ended Power (10/pack, Ballast Compatible) Bulb Type: T8 T10 48" LED tube 36W Daylight White 5000-5500k. ETL Classified. Professional Grade. Conforms to ETL. Certified to CSA STD. High efficiency (100-120 lumen per watt). Energy Saving. High Efficient Output. Save 80% on electricity bill of lighting comparing with traditional fluorescent light Dual-ended Power. No need to Remove Starter/Bypass Ballast. Then Plug in and light on right away. No extra replacement parts needed. Replaces 60W traditional fluorescent light tube. Easy Installation. International standard shape for replacing traditional T8 T10 fluorescent tube light Ballast Compatible(Electrical Ballast required). Environmentally friendly. No buzzing ballasts. No mercury or hazardous materials. 50K Hour LED Life. 5-Year Warranty. This limited warranty does not cover bulbs subject to accident, neglect, abuse and misuse. The light bulbs can be widely used at hospitals, medical centers, offices, warehouses, supermarkets and all kinds of locations.