Helios-75K SlimLite™
Helios-75K™ SlimLite is a high-radiation-tolerant LED floodlight engineered for reactor core illumination during fuel movement and reactor vessel inspection. Designed for versatile deployment, it performs reliably both submerged and in-air, delivering powerful, wide-beam white light for maximum visibility in demanding environments.
PERFORMANCE
With an output of up to 78,000 lumens, the Helios-75K™ SlimLite delivers wide-beam, dispersed white light using the latest in LED technology. Ideal for underwater applications such as reactor cores and spent fuel pools, as well as in-air environments like refueling cavities, this floodlight ensures superior visibility for inspections, maintenance, and operational tasks.
Built to withstand depths of up to 100 feet and exposure to irradiated fuel assemblies, the Helios-75K SlimLite™ is an optimal solution for illuminating reactor cores for video inspections or fuel movement. When used with Stud Mounting Kits, just 3-4 units can provide complete illumination of a BWR reactor core or 2-3 units for a PWR core, illuminating all the way to the core plate.
MANUAL/AUTO-DIMMING
With the capacity to produce up to 78,000 lumens of crisp, bright light there comes a point where changing conditions necessitate adaptation and that level of intense lighting can become overwhelming and counterproductive. Fully dimmable from 100% output to 10% power gives the end user total control allowing the light to perform exactly as needed. If it’s not the user adjusting light output based on conditions, it’s the conditions adjusting light output. The Helios-75K SlimLite™ incorporates a unique safety feature, Auto-Dimming, to protect itself from thermal overload. When the Helios-75K SlimLite™ is removed from water, its primary cooling medium, its operating temperature begins to rise. As this occurs, it senses the temperature increase and begins to lower its light output to maintain a safe operating level. In the warmest of open-air working environments, the Helios-75K SlimLite™ will effectively and safely cool itself through natural convection, operating down to 50% power levels if required. When conditions require fine control over light output, the end user can adjust this via a dimmer knob located on the Power Console.
PORTABILITY
Constructed of aluminum and finished with hard anodize, the Helios-75K SlimLite™ durable enough for easy, manual installation/removal. With the detachable cord secured to the light head with strain relief cord grips, the light is designed to hang from its cable in nearly any industrial environment. The Helios-75K SlimLite™ System includes (1) Light Assembly w/ strain relief cord grip, (1) Power Console, (1) 75′ removable power cord, and (1) lens replacement kit. Operating on standard 110-VAC or 220-VAC (DC input voltage is an available option) and drawing under 7-Amps adds to the portability and permits multiple lights to be configured on one electrical circuit.
TECHNICAL SPECIFICATIONS & FEATURES
| Light output | Up to 78,000 lumens |
| Light color | 5000K (white light) |
| Beam pattern | Flood |
| Radiation tolerance | No limit (Lens needs monitoring w/ very high doses) |
| LED Life | 50,000 hours (> 70% lumen output) |
| Dimming | 100-10% manual; 100-30% auto (temperature based) |
| Materials | Anodized aluminum; polycarbonate (lens) |
| Operating temp (°F) | 165 (maximum, in-air); ~135 (in water) |
| Power Factor | 98% |
| LED Efficacy (@85C) | 152 lumens/watt |
| Warranty | 1-Year; Limited; Parts replacement |
| Operating voltage | 90~305 VAC, 50~60Hz |
| Operating current | Up to 5.0 Amps |
| Depth rating | Up to 100-feet |
| Assembled weight | 42 lb (Light head) |
| Light Panel Size | 20″ H x 5″ W x 3.5″ Thinkness |
| Light head positions | Fixed vertical hanging; 45-degree downward shine (custom brackets available) |
| Cord | 95-ft, Integral Rubber |
| Protection | Thermal Overload; Short Circuit, Over Voltage; Fuse Protection |
| LED Flux (@85C) | 70,900 lumens |
| FME Equipped | Yes |
| Part Image | Part Description | EPI Part No. |
|---|---|---|
 |
Helios-75K SlimLite™ System, includes: – (1) Power Console – (1) Helios-75K™ Light Head – (1) 95-ft integral cord w/ strain relief – (1) Lens Replacement Kit |
D4911 |
| Replacement Parts (Sold Individually) | ||
 |
Helios-75K SlimLite™ Light Head Assembly w/ 95′ integral cord |
D4966 |
 |
Helios-75K™ Power Console w/ AC power cord |
D3189 |
 |
Helios-75K SlimLite™ Lens Replacement Kit, includes: – (1) Polycarbonate Lens (P/N: C3187) – (1) O-Ring – (1) 1-oz pack of Molykote lubricant |
C4914 |
