Completely assembled and ready to use. Features a built-in high-output ballast and a safety feature that will shut off the light if bulbs are removed or burn out during operation. 120-277V/60Hz input, 1.0-0.45Amps. Includes dual 55W Compact T5HO 6400K bulbs and 8 ft 120V power cord. Measures 24", x 12″.