tri-proof light detail: 1)Up to 6,000 hours lifetime 2)UL,CE,GS,EMC,RoHS,ENERGY STAR,ERP,ISO 3) ... ):IP65 Fluorescent lamp&Fixture1)1,500,000 pcs/month2)Up to 6,000 hours lifetime3)Flicker free4)High luminous efficiency, up ... range of operating temperaturesl(-20°C to +50°C)lInstant start-up 2012 HOT selling 2*18W straight tri-proof light ZM ...