Arcstream Metal Halide Lamp Tubular Clear E40 250W 742K Base: E40 Mogul Screw Wattage: 250W Voltage: 100V Color Temperature (K): 4200K (Natural White) CRI (RA): 70 Rated Life (hours): 10,000 Lamp Shape: Single Ended Tubular Length (mm): 220 Diameter (mm): 48 Technology: High Intensity Discharge High brightness, high quality white light with good color rendition and energy efficiency makes Metal Halide lamps suitable for many commercial and industrial interiors, particularly in high ceiling areas.