Mean Output (Lumens):21500 Rated Life (Hrs. 10 Hr.1Strat):15000 Color Temperature (k):4200 Color Rendering Index (CRI):65 Base Designatior :E39/E40Bulb Diameter mm:46Max Overall Length (MOL) mm:248Lamp Wattage(W):400WOperating Voltage(V):135Operating Current (Amps):3.5A

400w MH lamp