Product Overview
Sylvania 64321 M400/PS/U – 400W | 4200K Cool White | CRI 65 | ANSI M155/E, M135/O | Universal | E39 Mogul Screw
The Sylvania 64321 M400/PS/U is a 400W Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech lamp, CRI 65, ANSI M155/E, M135/O, EX39 Extended Mogul Screw (protected shield — rated for open or enclosed fixtures), 15,000 hours rated life, Universal 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: 46135643217. Item: M400PS-ED37-M155E.
Wattage 400W Metal Halide | Color Temp 4200K CRI 65 | ANSI Code M155/E, M135 Ballast Code | Rated Life 15,000 Hours | Base E39 Mogul |
Quick Specs
- Brand: Sylvania
- Series: Metalarc Pro-Tech
- Sylvania Order Code: 64321
- Manufacturer Part Number: M400PS-ED37-M155E
- UPC: 46135643217
- ANSI Code: M155/E, M135/O
- Lamp Type: Pulse-Start Metal Halide (PSMH) — Metalarc Pro-Tech
- Color Temperature: 4200K Cool White
- Wattage: 400W
- CRI: 65
- Rated Average Life: 15,000 hours
- Base Type: E39 Mogul Screw
- Overall Length / Diameter (MOL): 11.5 in. MOL x 4.5 in. Diameter
- Burn / Operating Position: Universal
- 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 64321 M400/PS/U 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 M155/E, M135/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: 15,000 hours.
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: Universal.
