Sylvania 64773 - MP175-BU-ONLY – 175W | 4000K Cool White | CRI 65 | ANSI M57/O | Within +/- 15° Only Burn Position | EX39 Extended Mogul Screw

The Sylvania 64773 - MP175-BU-ONLY is a 4000K Cool White Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech lamp, CRI 65, ANSI M57/O, EX39 Extended Mogul Screw (protected shield — rated for open or enclosed fixtures), 10,000 hours rated life, Within +/- 15° Only Burn Position burn position. Enclosed Or Open Fixtures. Pulse-start compatible ballast required. EX39 base with protective outer shield allows use in open or enclosed fixtures. UPC: 46135647734. Item: 64773.

Quick Specs

• Brand: Sylvania
• Series: Metalarc Pro-Tech
• Sylvania Order Code: 64773
• Manufacturer Part Number: 64773
• UPC: 46135647734
• ANSI Code: M57/O
• Lamp Type: Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech
• Wattage: 175W
• Color Temperature: 4000K Cool White
• CRI: 65
• Rated Average Life: 10,000 hours
• Base Type: EX39 Extended Mogul Screw (protected shield — rated for open or enclosed fixtures)
• Overall Length / Diameter (MOL): 8.31in x DIA 3.5in
• Burn / Operating Position: Within +/- 15° Only Burn Position
• Fixture Compatibility: Enclosed Or Open Fixtures
• Start Type: Pulse-Start — requires pulse-start ballast and 4kV socket
• Mercury Content: Contains mercury — dispose per local regulations.

Product Overview

The Sylvania 64773 - MP175-BU-ONLY is a 4000K Cool White Metalarc Pro-Tech pulse-start metal halide lamp with EX39 Extended Mogul base. The outer protective shield qualifies this lamp as an O-type (ANSI M57/O), making it suitable for use in both open and enclosed fixtures. Pulse-start technology delivers faster warm-up and improved lumen maintenance over lamp life compared to probe-start metal halide. Rated life: 10,000 hours.

Requires a pulse-start compatible HID ballast rated for and a 4,000V pulse-rated socket. Mercury content — dispose per local regulations.

Applications

• Commercial and industrial HID lighting – High-bay warehouses, outdoor area lighting, parking lots, retail, and security lighting.
• Retrofit and maintenance replacement – Verify ANSI code, wattage, and burn position before ordering. Pulse-start lamps require a pulse-start ballast — not interchangeable with probe-start.

Safety and Installation

• Pulse-start ballast required. Pulse-start compatible ballast required. EX39 base with protective outer shield allows use in open or enclosed fixtures.
• Fixture: Enclosed Or Open Fixtures.
• Burn position: Within +/- 15° Only Burn Position.