METAL HALIDE - Sunlight high intensity discharge lamps are perfect for outdoor lighting and commercial interiors. These energy efficient HID lamps offer exceptional efficacy, great color rendition, have a long service life and excellent lumen maintenance. HIGH INTENSITY DISCHARGE - This 70 watt bulb puts out a bright 5600 lumens of light. Color temperature is 4000K. Clear glass bulb. MEDIUM BASE - Standard medium base (E26) for use in street lights, parking lot fixtures, perimeter lighting, and other commercial and industrial lighting applications. Bulb measurements 2. 18 inches diameter, 5. 3 inches tall. PULSE START - These bulbs feature pulse start for quicker startup, less lumen depreciation, long 15, 000 hour average lifespan, and more lumens per watt so you save energy. ANSI CODE M98 - This metal halide bulb is for use in M98 ballast fixtures. Confirm ANSI Code to help determine the correct bulb for your fixture and the ballast it uses.