Product Overview
Sylvania 64189 MS400/PS/BU-ONLY BT28 – 400W | 4100K Cool White | CRI 65 | ANSI M155/E, M135/E | Dedicated Burn Position | E39 Mogul Screw
The Sylvania 64189 MS400/PS/BU-ONLY BT28 is a 4100K Cool White Pulse-Start Metal Halide (PSMH) — Metalarc lamp, CRI 65, ANSI M155/E,M135/E, E26 Medium Screw, 15,000 hours rated life, Dedicated Burn Position burn position. Enclosed Fixtures Only. Requires a pulse-start compatible HID ballast and 4,000V pulse-rated socket. UPC: 46135641893. Item: 64189-MS400-PS-BU-ONLY- BT28.
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Wattage
400W
Metal Halide
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Color Temp
4100K
CRI 65
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ANSI Code
M155/E, M135
Ballast Code
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Rated Life
15,000
Hours
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Base
E39
Mogul
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Quick Specs
- Brand: Sylvania
- Series: Metalarc Pulse-Start
- Sylvania Order Code: 64189
- Manufacturer Part Number: 64189-MS400-PS-BU-ONLY- BT28
- UPC: 46135641893
- ANSI Code: M155/E, M135/E
- Lamp Type: Pulse-Start Metal Halide (PSMH) — Metalarc
- Wattage: 400W
- Color Temperature: 4100K Cool White
- CRI: 65
- Rated Average Life: 15,000 hours
- Base Type: E39 Mogul Screw
- Overall Length / Diameter (MOL): 8.31in x DIA 3.5in
- Burn / Operating Position: Dedicated Burn Position
- Fixture Compatibility: Enclosed Fixtures Only
- Start Type: Pulse-Start — requires pulse-start ballast and 4kV socket
- Mercury Content: Contains mercury — dispose per local regulations.
Product Overview
The Sylvania 64189 MS400/PS/BU-ONLY BT28 is a 4100K Cool White Pulse-Start Metal Halide (PSMH) — Metalarc for commercial and industrial HID lighting. CRI 65. Rated life: 15,000 hours. Enclosed Fixtures Only.
Requires a pulse-start compatible HID ballast and 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. Requires a pulse-start compatible HID ballast and 4,000V pulse-rated socket.
- Fixture: Enclosed Fixtures Only.
- Burn position: Dedicated Burn Position.
