Sylvania MP400/BU-ONLY 64705 400W M59/O – 400W | 3600K Cool White | CRI 65 | ANSI M59/O | Base-Up Within Plus or Minus 15 Degrees | EX39 Extended Mogul Screw

The Sylvania MP400/BU-ONLY 64705 400W M59/O is a 400W Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech lamp, CRI 65, ANSI M59/O, EX39 Extended Mogul Screw (protected shield — rated for open or enclosed fixtures), Base-Up Within Plus or Minus 15 Degrees 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: 46135647055. Item: Protected 400w BT37 HID.

Quick Specs

• Brand: Sylvania
• Series: Metalarc Pro-Tech
• Sylvania Order Code: 64705
• Manufacturer Part Number: Protected 400w BT37 HID
• UPC: 46135647055
• ANSI Code: M59/O
• Lamp Type: Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech
• Color Temperature: 3600K Cool White
• Wattage: 400W
• CRI: 65
• Rated Average Life: 20,000 hours
• Base Type: EX39 Extended Mogul Screw (protected shield — rated for open or enclosed fixtures)
• Overall Length / Diameter (MOL): (MOL): 11.5 in
• Burn / Operating Position: Base-Up Within Plus or Minus 15 Degrees
• 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 MP400/BU-ONLY 64705 400W M59/O is a 400W 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 M59/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.

Requires a pulse-start compatible HID ballast rated for 400W 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: Base-Up Within Plus or Minus 15 Degrees.