Description 8FT T8 LED Lamps Electrical specifications: LED Quantity: 144pcs LEDs Power: 40W Input voltage: 100-277VAC Lighting source: Epistar SMD2835 Frequency:50/60HZ THD: <20% Power Factor: 0.96 Working temperature: -20℃-60℃ Opitical specification: Lumens: 4400lm-4800lm CCT: 5000K daylight white CRI: >80Ra Efficacy: 110-120lm/w Beam angle: 120deg. Life maintenance: 95%@1000hrs Lifespan: 50,000hrs Certificate: cETL ETL, DLC listed Warranty: 5 years Physical specification: Base: FA8 single pin / R17D end cap Cover: frosted diffuser Dimensions:  8ft(L)x 1.26″(D) Housing: Aluminum/polycarbonate work environment: interior use   Special offer:  Should you need the 8ft T8 LED lamps in  3000K/6000K with clear cover;  motion sensor; nano polycarbonate; 0-10v dimmable/Triac dimmable ;  R17D HO end cap/rotable end cap/G13 double pins; pls leave us message on special order quote page, we can make for you, just need some lead time.