Apollo Horticulture GLBMH600 600 - Watt Metal Halide MH Grow Light Bulb Lamp Garden, Lawn, Supply, Maintenance Lumens: 61,000, Base Type: Mogul E39 Base, Added extra stabilizers and reinforced glass casing for i Compatibility: Strikes both magnetic and digital ballasts (ANSI Code: M47) Color Temp: 6500 Kelvin, Engineered for plant vegetative growth Regulation: USA Federal Standard 21 CFR 1040.30 + Canada Standard S OR/80-381 Average Lamp Life: 10,000 Hours of Improved Lamp Life