The PulseStrike T15 metal-halide lamp’s arc tube is contoured to follow the natural curve of the arc stream between electrodes, making it possible to use a higher fill gas pressure in the chamber and extend the lamp’s life. Designed for use in commercial and industrial, flood lighting, sports facility, and other applications, the lamps offer 2-min. warm-up time and 4-min. re-strike time. They’re available in 250W, 320W, 350W, and 400W designs.