Mercury Vapor Lamp: LP-AI-MV175 Wattage (W): 173.5 Lamp Voltage (V): 117.1 Lamp Current (A): 1.661 Lumens Output (Lm): 8395.2 Light Effency (Lm/W): 48.4 Power Ratio cosˆ: 0.89 Color Temperature(K): 4535 Color Rendering (Ra): 35