Model : 400W Self Ballast Metal Halide Lamp Brand : Stella Light Source Wattage : 400W Dimension (L x W x H) : 28.5cm x 6.2cm x 6.2cm Voltage : 115 Volts Color Temperature : 5500 Kelvin Bulb Base : E40 Average Life : 12,000 Hours Light Color : Daylight Color-Rendering Index : 92