cETL certified T8 LED Tube bulb - 180 degree rotatable end cap, G13 bi pin - perfect replacement of old fluorescent T8, T10 and T12 light bulbs, 50,000 hrs lifespan, Luminous flux: 1850-2050 lm, Ballast Bypass (no ballast required), Material: Aluminum and PC, Length: 4 ft., 48 in., or 1200 mm, 5 years warranty Perfect replacement of Fluorescent T8, T10 and T12 Tubes - An ideal energy saving choice for existing linear fluorescent fixtures Why this bulb is better? cETL certified - same as CSA and UL certifications http://www.intertek.com/marks/etl/ Easily installed - Non-Ballast Compatible. REMOVAL of Ballast and Starter is required (if ballast or strarter are installed) Longer Life = 50,000 working hours - NO Maintenance required More Durable than fluorescent bulbs Instant illumination, no flicker, no buzz Vibration and impact resistant Save 90% on Electricity bill Contains No Mercury or Lead, and NO UV emission 5 years warranty Specifications: LED Power: 18W = 180W incandescent - very bright Luminous flux: 1850-2050 lm Socket: G13 bipin (180 degree rotatable cap) Beam Angle: 160 degrees + 180 degrees Rotatable End Cap allows the rotation of the bulb and directing the bulb light in the needed direction Shell Color: Milky Material: Aluminum + PC Dimensions: Length = 1200 mm X Width = 26 mm Energy Efficient and Impact Resistant T8 tube led bulbs last more than 50,000 hours lifespan and no Maintenance required High quality and high brightness T8 18W LED light bulb T8 led tubes come with 5 years Manufacturer warranty, Environmental friendly, NO Mercury or Lead, Easy Installation with International standard socket shape Dimmable: No