The 1970 Superior factory brochure lists a "Germicidal lamp helps destroy bacteria to keep ambulance sanitary. Reflector shields eyes from its direct rays." It shows it to be a "standard extra" on all Superior Cadillac and Pontiac ambulances. My guess is that the second photo shows one of these. It is not illustrated in the catalog, just described.
UV Fluorescent lamp. 1970 would have been around the time somebody figured out how to build a transistorized ballast that didn't cook off in a few hours.
Seems like UV sterilizing light comes around every 20-25 years. Current generation is LED and touted to kill CARONA 19.
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