This from Dan McInerney:

Not directly related to a Chicago metro dept., but Tri-Lite is located in Chicago and given the history of the 888 Mars light with CFD and Chicago area depts. this should be of interest to readers

Mars “888” Traffic Breaker Warning Beacons

Tri Lite’s iconic Mars “888” Traffic Breaker is now available with energy-efficient, long-life LEDs. This rugged LED light is offered in addition to the classic halogen version which is widely used today. Both warning beacons utilize a distinctive gimbal mounted lamp to generate a “triple eight” light pattern that alerts traffic to approaching emergency equipment. The bright, oscillating light aids in clearing the road, day or night, even in adverse conditions while the polished stainless steel housing looks great on any vehicle!

Mars

MARS “888” PEDESTAL MOUNT BEACON

Mars

MARS “888” FLUSH MOUNT BEACON

End-users looking for parts for older versions (pre-1990) of the MARS “888” Light should contact Joe Dorgan at (520) 790-0196 or visit www.sirenman.com for more information.