Sylvania M175/U/MED 175W E26 Base Metal Halide 64479

Product Overview

Sylvania 64479 M175/U/MED — 175W Metal Halide Lamp, E26 Medium Base

The Sylvania 64479 M175/U/MED is a 175-watt Metal Halide (MH) Metalarc lamp from Sylvania, designed for commercial, industrial, and outdoor area lighting. With an E26 Medium Screw base, 4200K cool white color temperature, ANSI code M57, and a rated life of 10,000 hours, this lamp delivers 14,000 initial lumens. This is a probe-start Metal Halide lamp requiring a compatible MH-rated ballast. Enclosed fixtures only. Verify wattage, ANSI code, base type, and ballast compatibility before ordering.

Wattage

175W

Metal Halide

Lumens

14,000 lm

Initial Output

Color Temp

4200K

Cool White

Base

E26

Medium Screw

Rated Life

10,000 hrs

Average Life

Technical Specifications

SKU	M175UMED-64479
Brand	Sylvania
Sylvania Order Code	64479
Series	Sylvania Metalarc
Lamp Type	Metal Halide (MH) — Metalarc
Wattage	175W
Initial Lumens	14,000 lm
Color Temperature	4200K Cool White
Base Type	E26 Medium Screw
ANSI Code	M57
Start Type	Probe-Start
Burn / Operating Position	Universal
Rated Average Life	10,000 hours
Fixture Requirement	Enclosed Fixtures Only
Warm-Up Time	5–10 minutes
Hot Restrike Time	7–12 minutes
UPC / EAN	46135644795
Mercury Content	Contains mercury — dispose per local regulations.

Product Overview

The Sylvania 64479 M175/U/MED is a professional-grade Metal Halide replacement lamp engineered for commercial, industrial, and outdoor area lighting. At 175 watts, it delivers 14,000 initial lumens at 4200K cool white — well suited for retail, warehouse, industrial, and outdoor applications where good color rendering and high lumen output are required. Metal Halide produces significantly better color quality than HPS, with CRI typically in the 65–70 range.

This is a probe-start Metal Halide lamp — it requires a probe-start MH-rated ballast with ANSI code M57. It will not operate on a pulse-start ballast, HPS ballast, or Mercury Vapor ballast. Enclosed fixture installation is mandatory — this lamp emits UV radiation and must be shielded by the fixture's outer envelope. Allow 5–10 minutes warm-up time for full output; after switching off, allow 7–12 minutes for the lamp to cool before restarting.

Not recommended for: open fixtures, pulse-start ballast systems, or direct skin/eye exposure to unshielded UV output.

Compatible Applications

Commercial and retail lighting — Showrooms, retail stores, and commercial interiors requiring good color rendering at 4200K.
Industrial high-bay lighting — Warehouses, manufacturing facilities, and large indoor commercial fixtures.
Outdoor area lighting — Parking lots, perimeter security, and outdoor commercial fixtures rated for enclosed MH lamps.
Retrofit and maintenance replacement — Direct replacement for existing 175W probe-start MH lamps with E26 base and M57 ANSI code. Verify ballast compatibility before ordering.

Before Ordering — Verify

ANSI / Lamp Code: Confirm the existing lamp or ballast is rated for M57 (175W probe-start Metal Halide).
Wattage: Confirm the fixture and ballast are rated for 175W.
Base Type: Confirm the socket matches E26 Medium Screw.
Ballast Type: This lamp requires a probe-start MH-rated ballast. It will not operate on a pulse-start, HPS, or Mercury Vapor ballast.
Fixture Type: Confirm the fixture is enclosed — open fixture use is not permitted.
Burn Position: Fixture supports Universal operation — no restriction.

Safety and Handling Guidelines

Compatible HID Ballast Required: Use only with a probe-start Metal Halide ballast with matching ANSI code M57. Incorrect ballast type will cause lamp failure or fixture damage.
Enclosed Fixture Required: This lamp emits UV radiation. It must be installed only in enclosed fixtures with UV-protective shielding. Never install in open fixtures.
Warm-Up Time: Allow 5–10 minutes for the lamp to reach full output after starting.
Hot Restrike: After switching off, allow 7–12 minutes for the lamp to cool before restarting. Attempting a hot restrike can damage the lamp or ballast.
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 in accordance with federal, state, and local regulations.

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, UL listing, and Prop 65 requirements with the Sylvania manufacturer specification sheet prior to use in regulated installations.