Sylvania 64191 MS400-PS-BD-ONLY-BT28

Sylvania 64191 MS400/PS/BD-ONLY/BT28 – 400W | ANSI M155/E | E39 Base

Quick Specs

• Brand: Sylvania
• Series: Metalarc Pulse-Start
• Sylvania Order Code: 64191
• Manufacturer Ordering Abbreviation: MS400/PS/BD-ONLY/BT28
• UPC: 046135641916
• Lamp Type: Pulse-Start Metal Halide (PSMH) — Metalarc
• Wattage: 400W
• Lamp Finish: Clear
• Bulb Shape: BT28
• Base Type: E39 Mogul Screw
• ANSI Ballast Code: M155/E
• Operating Position: Base-down only, within 15° of vertical
• Average Rated Life: 20,000 hours
• Initial Lumens: 40,000
• Mean Lumens: 32,500
• CRI: 65
• Color Temperature: 4100K
• Efficacy: 100 LPW
• MOL (Max Overall Length): 8.31"
• LCL (Light Center Length): 5.0"
• Bulb Diameter: 3.5"
• Mercury Content: Contains mercury — dispose per local, state, or federal regulations.

Product Overview

The Sylvania 64191 MS400/PS/BD-ONLY/BT28 is a 400W Pulse-Start Metal Halide (PSMH) Metalarc lamp for commercial and industrial HID lighting in high-bay, outdoor, and area lighting applications. Pulse-start technology combines proven metal halide arc-tube design with ignitor technology for faster warm-up, high lumen maintenance, and reduced color shift over life compared to standard probe-start metal halide lamps. The manufacturer catalog lists two ANSI codes for this lamp: M155/E (current) and M135/E (original/legacy code) — both refer to the same lamp/ballast combination.

Operating position: Base-down only, within 15° of vertical. Ballasts with sustaining voltage below 270V may significantly reduce lamp life.

Fixture requirement: Enclosed fixture only (E-type)

Requires a pulse-start compatible HID ballast matched to ANSI M155/E and a pulse-rated mogul HID socket. Mercury content — dispose per local, state, or federal regulations.

Applications

• Commercial and industrial HID lighting – High-bay, outdoor, and area lighting for warehouses, manufacturing facilities, and similar fixture applications.
• Retrofit and maintenance replacement – Verify ANSI code, wattage, bulb shape, and operating position before ordering. Pulse-start lamps require a pulse-start ballast — not interchangeable with probe-start ballasts.

Safety and Installation

• Compatible pulse-start HID ballast required. Do not use on a probe-start ballast.
• Fixture requirement: Enclosed fixture only (E-type)
• Allow warm-up time: Several minutes are needed to reach full light output.
• Hot restrike: Allow the lamp to cool before restarting after a power interruption.
• UV radiation: This lamp can cause serious skin burn and eye inflammation from short-wave ultraviolet radiation if the outer envelope is broken or punctured. Use only in fixtures with adequate shielding.
• Mercury disposal: Contains mercury — dispose per local, state, or federal lamp recycling regulations.

Ordering Information

• Brand: Sylvania
• Series: Metalarc Pulse-Start
• Sylvania Order Code: 64191
• ANSI Code: M155/E
• UPC: 046135641916
• Wattage: 400W
• Base: E39 Mogul Screw
• Case quantities and bulk pricing: Contact ADL Supply for volume orders.

Compliance

• Contains mercury — dispose per local, state, or federal lamp recycling regulations.
• Conforms to 21 CFR 1040.30 (U.S.A.) and SOR/80-381 (Canada).
• Verify RoHS and Prop 65 compliance with the Sylvania/LEDVANCE product data sheet.

ADL Supply recommends confirming all specifications with the Sylvania/LEDVANCE product data sheet prior to installation. Questions? Call ADL Supply at 1-800-235-3489.