Overview
The Thomas Research ESP-125 is a quartz restrike controller designed to provide seamless auxiliary lighting control for HID (High-Intensity Discharge) lamp systems. This controller incorporates a current sense circuit that automatically lights a quartz lamp when the main HID lamp is extinguished. The unit is engineered for use with magnetic ballast circuits and provides reliable backup illumination to maintain system uptime in industrial, commercial, and specialty lighting applications.
Key Features
- Operates on HID circuits from 39-1500 watts and auxiliary lamps up to 500W
- Measures current drawn by the HID circuit rather than voltage, allowing use with virtually any type of lamp or ballast circuit
- Built-in timer keeps the quartz lamp on for 2-3 minutes during the HID lamp warm-up period
- Compact and simple to wire
- Compatible with HPS or Metal Halide (probe-start or pulse start) magnetic ballasts with a 120V tap or input
- 50/60 Hz operation
Technical Specifications
The ESP-125 is rated for flexible HID circuit operation and provides auxiliary lamp control up to 500 watts. The unit operates on 120V supply circuits with a built-in timer function to manage the quartz lamp duration during HID restart sequences.
Typical Applications
- Film and television production lighting systems requiring continuous illumination
- Sports and venue lighting where lamp failure cannot interrupt coverage
- Stadium and arena lighting backup systems
- Industrial and commercial HID lamp installations with redundancy requirements
- Specialty photographic and studio lighting setups
Compatibility & Replacements
Compatible With
- HPS (High-Pressure Sodium) HID lamp systems
- Metal Halide HID lamp systems (probe-start and pulse-start types)
- Magnetic ballast circuits with 120V tap or input
- HID circuits rated 39–1500 watts
- Auxiliary quartz lamps up to 500W
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator or electrician before ordering.
Works With
- Magnetic ballast control circuits
- Standard 50/60 Hz electrical supply
- HID lamp restart and warm-up protocols
