Federal Signal's Model 121S is a compact, rotating warning light designed for in–plant use. It features a parabolic reflector which rotates around an incandescent lamp, providing 60 flashes per minute in all directions. The 121S Vitalite is available in five dome colors (amber, blue, clear, green and red). It is UL Listed, cUL Listed, and CSA Certified.

Federal Signal's 121S comes ready to mount on a 1/2–inch pipe or surface mount. Optional brackets simplify installation on walls or in corners. The enclosure is also rated Type 4X for a water tight and dust tight seal.

The lamp projects an intense, fixed beam onto a parabolic reflector which rotates 360º, producing 60 flashes per minute. The 121 features a twist and lock dome which allows for fast and easy access to inspect and change the lamp.

This light is particularly useful as a signaling or warning device in high ambient noise areas where it can supplement audible signaling devices. It is also effective alerting hazardous conditions or dangerous areas.

Federal Signal's Vitalite is an economical rotating warning light for emergency warning or status indication in noisy areas.