P4D High Performance Parabolic, Size Type: 2x2, Lamp Type: 2 foot, T8: 17 watt fluorescent, Lamp Included: Yes, Ceiling Type: Grid, Louver Finish: matte anodized low iridescent semi-specular, Louver Type: 3 cells crosswise x 3 cells lenghwise, Air Function: Static-No Air Handling, Ballast Type: (2) electronic instant start T8, Voltage Rating: 120-277 VAC.