Sylvania 64815 MS175/PS-BU-ONLY

Product Overview

Sylvania 64815 MS175/PS-BU-ONLY Metalarc — 175W Pulse-Start Metal Halide Lamp, 4000K, E39 Mogul Base

The Sylvania 64815 MS175/PS-BU-ONLY is a 175-watt Pulse-Start Metal Halide (PSMH) Metalarc lamp from Sylvania, designed for commercial high-bay, outdoor area, and industrial HID lighting. With an E39 Mogul Screw base, ANSI M152/E and M137/E, 4000K cool white color temperature, CRI 65, approximately 15,000 initial lumens, and a rated life of 15,000 hours, this lamp delivers reliable high-output performance for warehouses, parking lots, retail, and security lighting. Base-up ±15° burn position only. Enclosed fixtures only. Requires a pulse-start HID ballast and 4kV pulse-rated socket. Verify ANSI code, wattage, burn position, and ballast type before ordering.

Wattage

175W

Pulse-Start MH

Lumens

~15,000 lm

Initial Output

Color Temp

4000K

CRI 65

Base

E39

Mogul Screw

Rated Life

15,000 hrs

Average Life

Technical Specifications

Brand	Sylvania
Series	Sylvania Metalarc Pulse-Start
Sylvania Order Code	64815
Lamp Type	Pulse-Start Metal Halide (PSMH) — Metalarc
Wattage	175W
ANSI Code	M152/E, M137/E
Initial Lumens	~15,000 lm
CRI	65
Color Temperature	4000K Cool White
Base Type	E39 Mogul Screw
Start Type	Pulse-Start — requires pulse-start ballast and 4kV socket
Burn / Operating Position	Base Up ±15° only (BU-ONLY)
Rated Average Life	15,000 hours
Fixture Compatibility	Enclosed Fixtures Only
Max Overall Length (MOL)	8.31"
Diameter	3.5"
UPC / EAN	46135648151
Mercury Content	Contains mercury — dispose per local regulations

Product Overview

The Sylvania 64815 MS175/PS-BU-ONLY Metalarc is a 175W Pulse-Start Metal Halide lamp for commercial and industrial HID lighting in high-bay warehouses, outdoor area fixtures, parking lots, retail, and security lighting applications. Pulse-start technology provides improved lumen maintenance, faster restrike times, and longer rated life compared to probe-start MH equivalents.

This lamp is rated for base-up ±15° burn position only — the BU-ONLY designation in the model number indicates it must be operated with the base pointing upward, within 15 degrees of vertical. Operating in a horizontal or base-down position will cause premature failure and may create a safety hazard. Confirm your fixture mounts the lamp in the base-up orientation before ordering.

This lamp requires a pulse-start HID ballast compatible with ANSI M152/E or M137/E and a 4kV pulse-rated socket. It will not operate correctly on probe-start MH ballasts, HPS ballasts, or Mercury Vapor ballasts.

Compatible Applications

High-bay warehouse and industrial lighting — 175W pulse-start MH for large interior commercial and industrial spaces with base-up fixture mounting.
Outdoor area and parking lot lighting — High-output cool white MH for parking lots, perimeter security, and outdoor area fixtures rated for enclosed MH lamps.
Retail and commercial area lighting — Commercial overhead fixtures using 175W pulse-start MH sources in base-up mounting.
Retrofit and maintenance replacement — Confirm ANSI code, wattage, burn position, and ballast type before ordering.

Before Ordering — Verify

ANSI Code: Confirm the existing ballast is rated M152/E or M137/E (175W pulse-start Metal Halide). This lamp requires a pulse-start ballast — not interchangeable with probe-start MH, HPS, or Mercury Vapor ballasts.
Wattage: Confirm fixture and ballast are rated for 175W.
Base Type: Confirm the socket matches E39 Mogul Screw.
Burn Position: This lamp is rated for base-up ±15° only. Confirm your fixture mounts the lamp base-up. Do not use in horizontal or base-down fixtures.
Fixture Type: Confirm the fixture is enclosed — open fixture use is not permitted.
Socket: Confirm the socket is pulse-rated for 4kV.

Safety and Handling Guidelines

Pulse-Start Ballast and 4kV Socket Required: Use only with a compatible pulse-start HID ballast and 4kV pulse-rated socket. Incorrect ballast type will cause lamp failure or fixture damage.
Base-Up ±15° Only: Operating outside this burn position range will cause premature failure and may create a safety hazard.
Enclosed Fixture Required: This lamp emits UV radiation. Install only in enclosed fixtures with UV-protective shielding.
High-Pressure Arc Tube: MH lamps operate under high internal pressure. Use appropriate eye protection when handling. Allow lamps to cool fully before removal.
Mercury Content: Contains mercury. Do not dispose of in regular trash. Recycle through an approved lamp recycling program. Visit lamprecycle.org for local options.

Compliance

Contains mercury — subject to applicable lamp recycling and disposal regulations. California, Washington, and other states may have mandatory take-back or handling fee requirements.
Verify RoHS compliance status and additional certifications with the Sylvania manufacturer specification sheet prior to use in regulated installations.