GE 12644 MVR400/CVBUXHOPA

Product Overview

GE 12644 MVR400/CVBUXHOPA — 400W Pulsearc Pulse-Start Metal Halide Lamp

The GE MVR400/CVBUXHOPA (order code 12644) is a 400-watt Pulsearc® Multi-Vapor® pulse-start metal halide lamp with a ED37 bulb and E39 Mogul Screw base, designed as a direct replacement lamp for HID fixtures built around a M135/M155 ANSI ballast circuit.

WATTAGE

400W

Input Wattage

LUMENS

42,000 lm

Mean: 31,500 lm

CCT

3700K

Cool White

BASE TYPE

E39

ED37 Bulb

CRI

70 CRI

Color Rendering Index

Technical Specifications

GE Order Code	12644
GE Model / Description	MVR400/CVBUXHOPA
Bulb Shape	ED37
Base Type	E39 Mogul Screw
Burning Position	VBU — Vertical, Base Up
Fixture Enclosure Rating	S — Restricted burning position — verify fixture suitability with GE documentation
Maximum Overall Length (MOL)	11.50"
Light Center Length (LCL)	7.00"
Wattage	400W
ANSI Ballast Type	M135/M155
Case Quantity	6
Rated Life	20,000 hrs
Initial Lumens	42,000 lm
Mean Lumens	31,500 lm
Color Temperature	3700K
CRI	70
Lamp Finish / Additional Info	Coated, Extra High Output

Product Overview

The GE MVR400/CVBUXHOPA is a 400-watt Pulsearc® Multi-Vapor® pulse-start metal halide lamp finished in coated glass, rated at 70 CRI and 3700K color temperature. It ships with a ED37 bulb envelope on a E39 Mogul Screw base and is built to operate on a M135/M155 ANSI-type metal halide ballast.

GE's Pulsearc® line uses pulse-start (igniter-based) arc tube technology, which typically delivers faster warm-up and re-strike, more consistent color over life, and higher efficacy than older probe-start designs of similar wattage. These lamps are commonly used as upgrades or replacements in enclosed HID fixtures such as wall packs, high-bay fixtures, and area/flood lights.

At 20,000 hours rated life and 42,000 initial lumens, this lamp is intended as a like-for-like replacement for GE order code 12644 — confirm the code printed on your existing lamp or fixture ballast label matches before ordering.

Compatible Applications

Fixtures wired for a M135/M155 ANSI-type metal halide ballast circuit
E39 Mogul Screw socket fixtures rated for 400W metal halide lamps
General commercial and industrial area lighting
Parking lot, warehouse, and wall pack fixtures already equipped with a matching ballast
Burning position: VBU (Vertical, Base Up)

Before Ordering – Verify

Confirm your fixture's ballast is rated ANSI type M135/M155 — GE metal halide ballasts are not interchangeable across different ANSI type codes, and pulse-start ignition systems are not interchangeable with probe-start ballast circuits; verify the ballast label before ordering.
Confirm base type (E39) and burning position (VBU — Vertical, Base Up) match your fixture — operating a lamp outside its rated position can shorten lamp life.
GE lists a restricted/special fixture designation (“S”) for this lamp — verify fixture enclosure and orientation requirements with GE documentation before ordering.
Confirm order code 12644 (GE MVR400/CVBUXHOPA) exactly matches the lamp or ballast label on your existing fixture before purchasing a replacement.
Case pack quantity is 6; confirm this meets your order needs.

Safety and Handling Guidelines

Contains mercury — dispose of in accordance with local, state, and federal regulations; do not place in regular household trash. Use a certified lamp recycler where required.
Always de-energize the fixture and allow the lamp to cool completely before relamping or servicing.
Metal halide lamps carry a small risk of non-passive (violent) failure at end of life or if operated past rated life; use only in a fixture with the enclosure/containment specified by the fixture manufacturer.
After a power interruption, allow the lamp to cool before it will restrike and return to full output — this is normal metal halide behavior, not a defect.

Compliance

Contains mercury; recycle/dispose of per applicable RoHS, EPA, and state lamp-disposal regulations.
Manufactured to GE's published ANSI lamp/ballast standard for the listed ballast type.