PHILIPS 400W METAL HALIDE | M59/S ED37 Clear | 4000K Mogul Base

The Philips 400W Switch Start Metal Halide (415224) is a high-intensity discharge (HID) powerhouse designed for industrial-scale illumination. Operating on the ANSI M59 standard, this clear ED37 bulb produces a crisp 4000K cool white light that is the benchmark for warehouse, factory, and outdoor flood lighting. With a robust 20,000-hour rated life and an E39 mogul base, it offers a dependable, high-lumen solution for high-bay fixtures. Engineered for universal burn positions, this lamp provides maximum installation flexibility while maintaining consistent performance across large commercial footprints.

Product Overview

Philips Metal Halide HID lamps are the industry standard for high-lumen, high-efficiency lighting in demanding environments. The ED37 clear envelope ensures maximum light transmission for large-area floodlighting and high-bay applications. This lamp is specifically optimized for switch start ballasts, providing a cost-effective lighting solution with excellent color rendering (65 CRI) for industrial tasks. Designed to handle the rigors of 24/7 operations, it maintains dependable performance throughout its long service life, significantly reducing maintenance cycles in hard-to-reach ceiling heights.

• High Output: Exceptional lumen density for warehouses and industrial floor spaces.
• Universal Burn: Can be operated in any orientation, though vertical operation is recommended for open luminaires.
• Cool White Light: 4000K spectrum enhances visibility and alertness in work environments.
• Wide Compatibility: Standard ANSI M59/S specs ensure it works with most existing 400W metal halide ballasts.

Technical Specifications

• Brand: Philips Lighting
• Ordering Code: MH400/U (415224)
• ANSI Code: M59/S
• Wattage: 400W
• Bulb Shape: ED37 (Clear)
• Base Type: E39 (Mogul Screw)
• Color Temperature: 4000K
• CRI: 65
• Rated Average Life: 20,000 Hours
• Burn Position: Universal
• Dimensions: 11.5" (MOL) x 4.62" (Diameter)
• Fixture Rating: Open or Enclosed (Open vertical ±15°)

Safety & Installation Notes

• Ballast Requirement: Must be operated on an ANSI M59 rated metal halide ballast.
• UV Radiation Warning: Damage to the outer bulb can lead to UV exposure. Discontinue use immediately if the glass is cracked or punctured.
• Fixture Safety: Suitable for open luminaires only when operated vertically (±15°). For all other burn positions, an enclosed fixture is required to protect against lamp rupture.
• Relamping: Turn off power and allow the lamp to cool completely before removal to avoid skin burns or electrical shock.

Primary Applications

• Industrial Lighting: High-bay factories, assembly lines, and machine shops.
• Warehousing: Large distribution centers and cold storage facilities.
• Outdoor Flood Lighting: Parking lots, security perimeters, and sports fields.
• Commercial Buildings: Retail big-box stores and convention centers.