M400W/U/BT28 400W Metal Halide Lamp – BT28, Clear Finish, E39 Base, 4000K Cool White

400-Watt Universal Burn Metal Halide Lamp – BT28 Shape, 36000 Lumens, 4000K Cool White, E39 Mogul Base, ANSI M59, Clear Finish

The M400W/U/BT28 Clear Metal Halide Lamp offers powerful illumination and reliable performance for industrial, commercial, and large-scale outdoor lighting applications. Operating at 400 watts with an ANSI M59 ballast requirement, this universal burn lamp delivers an impressive initial output of 36,000 lumens—making it ideal for use in parking lots, warehouses, sports arenas, and roadway fixtures.

Constructed with a durable BT28 outer bulb, the lamp’s clear finish ensures maximum light output and optical control. The cool white 4000K color temperature provides a crisp, bright light that enhances visibility and promotes a clean, professional environment. With a Color Rendering Index (CRI) of 65, it balances energy efficiency with moderate color accuracy—suited for general-purpose area lighting.

This lamp is designed with a mogul E39 screw base, allowing for easy installation in compatible fixtures. It features a long-rated life of 18,000 hours, reducing the need for frequent replacements in hard-to-reach or high-burn-time installations.

⚠️ Note: This is not open-rated and must only be used in enclosed fixtures for safety compliance.

🔹 Key Features:
✔ 400W Metal Halide Lamp – Delivers high lumen output for large-area lighting.
✔ BT28 Bulb Shape – Robust construction with clear finish for maximum brightness.
✔ Universal Burn Position – Flexible installation in multiple fixture orientations.
✔ 4000K Cool White – Crisp, neutral light ideal for visibility and focus.
✔ E39 Mogul Base – Standard screw-in base for quick installation.
✔ 36,000 Lumens – Bright and consistent illumination.
✔ 18,000-Hour Life – Long lifespan for reduced maintenance.
✔ ANSI M59 Ballast Required – Industry-standard compatibility.
✔ Not Open Rated – Must be used in enclosed fixtures.

🔹 Specifications:

• Wattage: 400 Watts

• Voltage: Dependent on Ballast (ANSI M59)

• Lamp Shape: BT28

• Base Type: E39 Mogul Screw

• Color Temperature: 4000K (Cool White)

• Color Rendering Index (CRI): 65

• Initial Lumens: 36,000

• Rated Life: 18,000 Hours

• Maximum Overall Length (MOL): 9.25 inches

• Lamp Length: 8.18 inches (207.77 mm)

• Diameter: 3.58 inches (90.93 mm)

• Finish: Clear

• Start Method: M59 Ballast Required

• Open Fixture Rated: No – Enclosed Fixture Required

• Package Quantity: 1 Lamp

• Case Quantity: 12 Lamps

The M400W/U/BT28 Metal Halide Lamp is engineered for powerful, long-lasting performance in commercial and industrial settings. Its bright, neutral white light and durable construction make it a dependable choice for large-scale lighting needs.