Model Number: GEGS-T5II Brand Name: GS Key Specifications/Special Features: Specification:1.Fixture's Material: Pure Aluminum + Square PC cover2.Input Voltage: AC100~260V/50-60Hz3.CFL Tube: T5 Tri-color fluorescent tube4.Power Factor: 0.6~0.95.Lifespan: 8000 hour6.Lamp Holder: G57.CRI>83 Size(mm) 368*61*60 565*21*45 629*21*45 929*21*45 1129*21*45 Watt(W) 8 13 14 21 28 Tube Length(mm) 288 517 549 849 1149