Sylvania 64733 MP175/BU-Only Med – 175W | 3600K Cool White | ANSI M57/O | Base-Up Within ±15° Only | E26 Medium Screw

The Sylvania 64733 MP175/BU-Only Med is a 175W Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech lamp, ANSI M57/O, EX39 Extended Mogul Screw (protected shield — rated for open or enclosed fixtures), 10,000 hours rated life, Base-Up Within ±15° Only burn position. Open or Enclosed Fixtures. Pulse-start compatible ballast required. EX39 base with protective outer shield allows use in open or enclosed fixtures. UPC: 46135647338.

Quick Specs

• Brand: Sylvania
• Series: Metalarc Pro-Tech
• Sylvania Order Code: 64733
• UPC: 46135647338
• ANSI Code: M57/O
• Lamp Type: Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech
• Color Temperature: 3600K Cool White
• Wattage: 175W
• Rated Average Life: 10,000 hours
• Base Type: E26 Medium Screw
• Overall Length / Diameter (MOL): 8.31" Length × 3.5" Diameter (ED17)
• Burn / Operating Position: Base-Up Within ±15° Only
• Fixture Compatibility: Open or Enclosed Fixtures
• Start Type: Pulse-Start — requires pulse-start ballast and 4kV socket
• Mercury Content: Contains mercury — dispose per local regulations.

Product Overview

The Sylvania 64733 MP175/BU-Only Med is a 175W 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 175W 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: Open or Enclosed Fixtures.
• Burn position: Base-Up Within ±15° Only.