This is from  a Federal Signal Corporation J series A lightbar and is tested and working. This rotator light comes with the bulb. The last picture is from the lightbar it came from. This works with the Jetsonic and Jetstream lightbars or could be adapted to your own setup. I have 4 of these and a couple have some light rust spots on the mount. I took pictures of the worst one and it is very minimal. This is for one rotating light assembly.

The Federal Signal Jetsonic / Jetstream Lightbar Regular Speed Rotator Bayonet Bulb assembly is a historically significant firefighting and rescue tool. This bayonet bulb was designed for use in rotating lightbars, providing a steady and reliable source of light during emergency situations. It embodies the theme of firefighting and rescue, reflecting the dedication and professionalism of those who work in the field. With its durable design and specific purpose, this product serves as a valuable collectible for enthusiasts of firefighting memorabilia.

Lghtbr tote (J)