LU400/H/ECO GE 85379 400W S51 High Pressure Sodium – 400W | 2100K Warm Amber | CRI ~22 | ANSI S51/O | Standard ECO | E39 Mogul Screw

The LU400/H/ECO GE 85379 400W S51 High Pressure Sodium is a 400W 2100K Warm Amber High Pressure Sodium (HPS) lamp in the GE Lighting Lucalox series, ANSI S51/O, E39 Mogul Screw, 50,000 initial lumens, 24,000 hours rated life, Standard ECO variant, ED18 bulb. Requires a compatible HPS ballast — do not use on metal halide or mercury vapor ballasts. Contains mercury — dispose per local regulations. UPC: 43168853798. MPN: LU400HECO-ED18-S51.

Wattage

400W

HPS

Color Temp

2100K

CRI ~22

ANSI Code

S51/O

Ballast Code

Rated Life

24,000

Hours

Base

E39

Mogul

Quick Specs

Brand: GE Lighting
Series: GE Lucalox
GE Order Code: 85379
Manufacturer Part Number: LU400HECO-ED18-S51
UPC: 43168853798
ANSI Code: S51/O
Lamp Type: High Pressure Sodium (HPS) — Lucalox
Wattage: 400W
Color Temperature: 2100K Warm Amber
CRI: ~22
Initial Lumens: 50,000 lm
Rated Average Life: 24,000 hours
Base Type: E39 Mogul Screw
Bulb Shape: ED18
Burn / Operating Position: Universal
Variant: Standard ECO
Mercury Content: Contains mercury — dispose per local regulations.

Product Overview

The LU400/H/ECO GE 85379 400W S51 High Pressure Sodium is a 400W 2100K Warm Amber GE Lucalox High Pressure Sodium lamp. Standby (SBY/XL) lamps feature hot-restrike capability — the lamp stays on a standby circuit after arc extinguishment, allowing immediate restart without the 10–20 minute cool-down required by standard HPS. Ideal for security, retail, and facilities requiring uninterrupted illumination.

HPS ballast required. This lamp must be operated on a compatible High Pressure Sodium ballast matched to ANSI code S51/O. HPS lamps are not interchangeable with metal halide or mercury vapor ballasts. Contains mercury — dispose per local regulations.

Applications

Outdoor area and street lighting – Roadways, parking lots, municipal streetlights, and perimeter security lighting.
Industrial and commercial high-bay – Warehouses, manufacturing facilities, and large indoor/outdoor commercial fixtures.
Retrofit and maintenance replacement – Verify ANSI code and wattage before ordering. HPS lamps require an HPS-rated ballast.

Safety and Installation

HPS ballast required. Operate only on a High Pressure Sodium ballast rated for ANSI S51/O. Do not use on MH or mercury vapor ballasts.
Standby (SBY) hot-restrike: This lamp is designed to restart immediately after a power interruption via a standby circuit. Verify fixture compatibility before installation.
Allow warm-up time: 3–5 minutes for full output.
Hot restrike: Immediate via standby circuit.
UV radiation: Use only in fixtures with UV-protective shielding. Do not operate with a broken or cracked outer envelope.
Mercury disposal: Contains mercury — dispose per local lamp recycling regulations.