I have made a correction of the light’s name in my reply made earlier.
I did not remember the light’s exact name when I wrote it but I have now looked at the name tag and it is in fact:
Miller-Meteor 360 Ful-Vu-Lite.
Why it is sometime called Grimes is because it was made by the aviation equipment manufacturer Grimes, now part of Honeywell, from an anti collision light (might have been for a B-52).
The Miller-Meteor plant was nearby the Grimes factory and they made these lights more or less exclusively for Miller-Meteor.
But a few other users have used the lights also. A local fire apparatus manufacturer as it seems.
Someone has a set that came off a Superior Criterion ambulance.
If that was an aftermarket installation (old M-M lights) or a factory installation (special order), I do not know but I can not recall I ever have seen a Superior ambulance with these lights.
Michael