Sylvania 64578 MS250/PS/BU-ONLY – 250W | 4200K Cool White | ANSI M153/E, M138/E | Base-Up (BU) Dedicated | E39 Mogul Screw

The Sylvania 64578 MS250/PS/BU-ONLY is a 250W Pulse-Start Metal Halide (PSMH) — Metalarc lamp, ANSI s: M153/E, M138/E, E26 Medium Screw, 15,000 hours rated life, Base-Up (BU) Dedicated burn position. Enclosed Fixtures Only. Requires a pulse-start compatible HID ballast and 4,000V pulse-rated socket. UPC: 46135645785. Item: MS250PSBU-64578.

Quick Specs

• Brand: Sylvania
• Series: Metalarc Pulse-Start
• Sylvania Order Code: 64578
• Manufacturer Part Number: MS250PSBU-64578
• UPC: 46135645785
• ANSI Code: M153/E, M138/E
• Lamp Type: Pulse-Start Metal Halide (PSMH) — Metalarc
• Color Temperature: 4200K Cool White
• Wattage: 250W
• Rated Average Life: 15,000 hours
• Base Type: E39 Mogul Screw
• Overall Length / Diameter (MOL): 8.31" MOL x 3.5" Diameter
• Burn / Operating Position: Base-Up (BU) Dedicated
• 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 64578 MS250/PS/BU-ONLY is a 250W Pulse-Start Metal Halide (PSMH) — Metalarc for commercial and industrial HID lighting. 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: Base-Up (BU) Dedicated.