Well, I know nobody would of ever thought of because it is extremely random. But I am an aspiring electrician and can't leave the house so here it is.
The exit signs at Canobie are very interesting. It used to be mostly 'Lithonia' brand signs in the late 90's early 2000's. When I was little I always got scared riding psycho drome not because of the ride but because all that was visible was the lithonia brand EXIT sign and the light from the crack of the door. I always thought my car would fly right out of the double doors.
Then from the time the new entrance was built all the new signs around the park were mostly Thomas & Betts brand. These ones can also be seen in the Dancehall Theater, the haunts building, the mens and probably womans restroom too next to Boston Harbor patrol, bear lodge, replaced a sign in pyscho drome and the portifino reasturant and the midway arcade (Palace is the name I think) Theres probably many other places these signs are I just can't think of them.
In vertigo theater and the both arcades Dual Lite signs were in place. Then the one in vertigo theater was moved and one of the signs in the arcade on the midway was replaced.
Then for scream fest these black combo signs were put into the haunted houses and later the mine of lost souls. The signs replaced in the mine were from the late 80's early 90's (obviously since that's when the ride was built) and they were all the same except for the one at the very end of the ride which must have been added from sally corps refurb.
Now all the new signs are mostly the new brand that are popping up not just at Canobie. These ones can be seen in the untamed station, bear lodge and bear lodge bathrooms. The ones in untamed station look like they were spray painted black but I could be wrong.