PHILIPS 207555 | 175W Pulse Start Metal Halide | 3500K ED28 Clear

The Philips 207555 (MS175/BU/PS) is a high-performance 175-watt pulse start metal halide lamp engineered for superior efficiency and faster restrike times in commercial and industrial environments. Featuring a clear ED28 bulb shape and an EX39 exclusionary mogul base, this lamp is O-rated, making it safe for use in both open and enclosed outdoor fixtures. Its pulse start technology provides significant benefits over standard metal halide systems, including improved lumen maintenance and a longer 14,000-hour rated life. Delivering a crisp 3500K white light at 16,000 initial lumens, it is an ideal solution for large-scale area lighting, floodlighting, and high-bay applications.

Product Overview

The Philips 207555 pulse start system is designed for high-demand outdoor HID lighting. Unlike traditional probe-start lamps, the pulse start mechanism uses a high-voltage ignitor to start the lamp, resulting in faster warm-up periods and a more consistent 3500K color temperature. This model is specifically designed for Base Up ±15° operation, ensuring the arc tube remains stable for maximum efficiency. Its O-Rating provides a mechanical safety advantage, as it is tested to withstand the impact of an arc tube rupture without the need for a secondary fixture shroud, offering more flexibility in fixture selection for industrial warehouses or outdoor parking lots.

• Pulse Start Efficiency: Better lumen maintenance and longer life compared to standard M57 probe-start lamps.
• Flexible Fixture Rating: Open-rated (O) design allows for use in fixtures without a protective lens.
• Extended Mogul Base: The EX39 base is designed to work in both exclusionary and standard mogul sockets.
• High Performance: 16,000 initial lumens provide powerful visibility for safety and security applications.

Technical Specifications

• Brand: Philips
• Order Code / SKU: 207555
• ANSI Code: M152/M137/O
• Wattage: 175W
• Voltage: 132V
• Base Type: EX39 (Exclusionary Mogul Screw)
• Bulb Shape: ED28
• Bulb Finish: Clear
• Color Temperature: 3500K
• CRI: 62
• Initial Lumens: 16,000 lm
• Rated Average Life: 14,000 Hours
• Operating Position: Base Up ±15°
• Dimensions: 8.31" MOL x 3.5" Diameter

Safety & Installation Guide

• Ballast Requirement: Must be used with an M137 or M152 ANSI-rated ballast. Do not operate on probe-start (M57) ballasts.
• Burn Position: This lamp is specifically optimized for Base Up installation. Operating in any other position will significantly reduce light output and lamp life.
• Fixture Type: Rated for use in Open or Enclosed fixtures. Ensure the fixture can handle the high thermal output of a 175W lamp.
• UV Warning: Do not operate if the outer glass envelope is broken. UV radiation from a cracked lamp can cause skin and eye irritation.

Primary Applications

• Outdoor Area Lighting: Ideal for parking lots, gas stations, and perimeter security.
• Commercial High-Bays: Reliable lighting for gymnasiums, warehouses, and retail centers.
• Floodlighting: Provides wide coverage for building facades and athletic fields.
• Downlighting: Used in large commercial lobbies or industrial work spaces.