Product Overview

Philips 37721-8 MHC150/C/U/M/4K/ALTO – 150W | 4000K Cool White | CRI 92 | ANSI M142/E Or M102/E | Universal | E26 Medium Screw

The Philips 37721-8 MHC150/C/U/M/4K/ALTO is a 150W 4000K Cool White MasterColor Ceramic Metal Halide (CMH) lamp, CRI 92, ANSI M142/E Or M102/E, E26 Medium Screw, 12,000 initial lumens, 20,000 hours rated life, Universal burn position. Enclosed Fixtures Only. Requires a compatible CMH ballast. Enclosed fixtures only. Philips order code: 37721-8 MHC150/C/U/M/4K/ALTO.

Wattage

150W

CMH/MH

Color Temp

4000K

CRI 92

ANSI Code

M142/E Or M1

Ballast Code

Rated Life

20,000

Hours

Base

E26

Medium

Quick Specs

Brand: Philips
Series: Philips MasterColor
Philips Order Code: 37721-8 MHC150/C/U/M/4K/ALTO
ANSI Code: M142/E Or M102/E
Lamp Type: MasterColor Ceramic Metal Halide (CMH)
Wattage: 150W
Color Temperature: 4000K Cool White
CRI: 92
Initial Lumens: 12,000 lm
Rated Average Life: 20,000 hours
Base Type: E26 Medium Screw
Overall Length / Diameter (MOL): 5.43in x DIA 2.125in
Burn / Operating Position: Universal
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 Philips 37721-8 MHC150/C/U/M/4K/ALTO is a 150W 4000K Cool White Philips MasterColor ceramic metal halide lamp. CMH ceramic arc tube technology delivers CRI 92 color rendering with superior color stability over lamp life for commercial, retail, and architectural high-CRI lighting in enclosed fixtures. Rated life: 20,000 hours.

Requires a compatible CMH ballast with thermal protection. Contains mercury — dispose per local regulations.

Applications

Commercial and high-CRI lighting – Commercial, retail, and architectural high-cri lighting in enclosed fixtures.
Retrofit and maintenance replacement – Verify ANSI code, wattage, and base type before ordering. Requires thermally protected CDM control gear.

Safety and Installation

Thermally protected ballast required. Requires a compatible CMH ballast. Enclosed fixtures only.
Fixture: Enclosed Fixtures Only.
Burn position: Universal.
Allow warm-up time: 2–5 minutes for full output.
Hot restrike: Allow 5–12 minutes after switching off before restarting.
UV radiation: Use only in fixtures with UV-protective shielding.
Mercury disposal: Contains mercury — dispose per local lamp recycling regulations.