UltraMax GE332MAXN GE 78623 GE332MAXP-N/ULTRA

Product Overview

GE 78623 GE332MAX-N UltraMax — 1-3 Lamp T8 Electronic Instant Start Ballast, 120-277V

The GE 78623 GE332MAX-N UltraMax is a 1-3 lamp T8 electronic instant start ballast from GE Lighting, designed for standard commercial fluorescent lighting applications. Universal voltage input covers 120-277V, ballast factor 0.88, THD under 10%, parallel lamp operation, -20°F cold start capability, and anti-striation control. UL Type CC, UL Type 1 Outdoor, FCC Part 18, and RoHS compliant. Compact housing at 9.5" x 1.3" x 1.2". Verify lamp type, lamp count, and input voltage before ordering.

Lamp Count

1–3 Lamps

T8 Fluorescent

Input Voltage

120–277V

Multi-Voltage

Start Type

Instant Start

Electronic

Ballast Factor

0.88

Normal Output

Min Start Temp

-20°F

Cold Start

Technical Specifications

Brand	GE Lighting
Series	GE UltraMax
GE Order Code	78623
Model	GE332MAX-N
Ballast Type	Electronic Instant Start
Lamp Count	1–3 Lamps
Compatible Lamp Family	T8 Fluorescent
Input Voltage	120–277V AC
Start Method	Instant Start
Ballast Factor	0.88 (Normal Output)
Circuit Type	Parallel (Independent Lamp Operation)
Total Harmonic Distortion (THD)	<10%
Sound Rating	Class A (20–24 dB)
Minimum Starting Temperature	-20°F
Maximum Case Temperature	70°C
Dimensions	9.5" L x 1.3" W x 1.2" H
Listings / Compliance	UL Type CC, UL Type 1 Outdoor, FCC Part 18, RoHS Compliant

Product Overview

The GE 78623 GE332MAX-N UltraMax is a standard-output electronic instant start ballast engineered for consistent, energy-efficient performance in commercial T8 fluorescent systems. The 0.88 ballast factor delivers the industry-standard balance between brightness and energy savings — the most widely specified output level for general-purpose 3-lamp T8 fixtures.

Parallel lamp circuit operation means if one lamp fails, the remaining lamps continue operating independently. Anti-striation control reduces visible flicker in energy-saving T8 lamps. Universal voltage input (120–277V) eliminates the need for voltage-specific models across mixed-voltage commercial facilities. The -20°F cold start rating and UL Type 1 Outdoor listing support use in low-temperature and covered outdoor applications.

Note on start method: Instant start ballasts deliver immediate full output but do not preheat lamp cathodes, which can reduce lamp life in high-switching or occupancy sensor applications. For those installations, a programmed rapid start ballast is recommended.

Compatible Lamps

(1–3) F32T8 — 48" standard lamps
(1–3) Energy-saving T8 — 25W, 28W, 30W (48")
(1–3) F25T8 — 36" lamps
(1–3) F17T8 — 24" lamps
(1–3) F15T8
(1–3) F25T12 — 36" lamps
Equivalent U-bend T8 fluorescent lamps

Compatible Applications

Commercial office and retail lighting — Troffers, strip fixtures, and wrap-around luminaires using 1–3 lamp T8 configurations.
Educational and institutional facilities — Classrooms, hallways, and general-purpose fluorescent fixtures.
Low-temperature and outdoor applications — UL Type 1 Outdoor rated; -20°F cold start for covered outdoor or unheated space installations.
Retrofit and maintenance replacement — Universal voltage input fits 120V and 277V commercial circuits.

Before Ordering — Verify

Lamp Type: Confirm your lamps are on the compatible lamp list above.
Lamp Count: Confirm fixture requires 1, 2, or 3 lamps. This ballast does not support 4-lamp configurations.
Input Voltage: Confirm your circuit voltage is within 120–277V.
Start Method: Instant start ballasts do not support dimming and may reduce lamp life in high-switching applications — for occupancy sensor use, a programmed rapid start ballast is recommended.
Physical Fit: Confirm 9.5" x 1.3" x 1.2" dimensions fit within your fixture's ballast cavity.