Sodium Lamp: LP-AI-HPS250 Wattage (W): 250 Lamp Voltage (V): 100 Lamp Current (A): 3 Lumens Output (Lm): 28000 Light Effency (Lm/W): 112 Power Ratio cosˆ: 0.83 Color Temperature(K): 2000 Color Rendering (Ra): 20