Clear | 400W | 4000K | ET18 | E39 | M59 ANSI | 18,000 Hr Life

The M400W/U/ET18 Metal Halide Lamp delivers powerful, neutral-white illumination at 4000K, ideal for industrial, commercial, and outdoor lighting. With an ET18 clear envelope, E39 mogul base, and ANSI M59 ballast compatibility, this lamp is engineered for high-output performance with reliable 18,000-hour life. Suitable for enclosed fixtures only.

Specifications

• Electrical & Performance

  • Wattage: 400W

  • Voltage: Requires compatible ballast (ANSI M59)

  • Color Temperature: 4000K

  • Color Rendering Index (CRI): 65

  • Life Hours: 18,000

  • ANSI Code: M59

  • Start Method: M59

  • Open Rated: No

• Physical Characteristics

  • Shape: ET18

  • Base: E39 (Mogul)

  • Length: 9.78" (248.41 mm)

  • Maximum Overall Length (MOL): 10.5"

  • Diameter: 2.28" (57.91 mm)

  • Finish: Clear
    

Applications:
Designed for high bay warehouses, gymnasiums, parking lots, and area lighting. Best used in enclosed fixtures where consistent lumen output and long lamp life are essential.