Radium HRI-TS 2000w N/L 4000k K12S Metal Halide Long Arc Lamp - Cool White

The Radium HRI‑TS 2000 W N/L long‑arc lamp is a high‑performance metal halide lamp with quartz burner, engineered for demanding floodlighting and large‑area illumination. It offers a luminous flux of ≈ 230,000 lm with an efficacy near 107 lm/W under ideal conditions. Its colour temperature is specified around 4100 K (cool / neutral white), giving crisp and relatively neutral lighting for large venues. The lamp uses a K12S (K12s‑36) double‑ended base and is designed for enclosed luminaires, to contain fragments in case of failure. 

In terms of performance and life, it has an average rated life of ~ 8,000 hours, with lumen maintenance values of 0.91 at 2,000 h, and ~ 0.80 at 8,000 h. The lamp must be operated with a proper ignitor and matched ballast / control gear (typically electromagnetic or high frequency with correct parameters), and is non‑dimmable. The compact design (total length ~ 274 mm, diameter ~ 32 mm) helps in reducing wind load and fitting into tight floodlight housings.  Because of its high output and arc length, correct thermal, electrical, and mechanical design is critical to keep performance and safety.