The JCBL Round LED high bay from Lithonia Lighting is the affordable LED solution for users who have been hesitant to embrace LED due to cost and, prefer a high bay with the traditional round form factor of HID for ease of installation and retrofit.Simple one-for-one replacement for existing HID or linear fixtures warehouses, gymnasiums and manufacturing facilities. Replaces up to 400W HID and up to eight-lamp T5HO luminaires.JCBL features an aluminum heat sink to maximize heat dissipation and extend the life of the luminaire by maximizing contact with the LEDs. A glass optical enclosure (IP65 rated) protects the LEDS from dust and other air containments. UL1598/C SA C22 .2 250, Buy American Act. Damp location listed. Suitable for use in ambient temperatures from 32°F (0°C) to 122°F (50°C).