I have never seen this episode. My parents used to watch this show all the time back then and I checked the date of this episode which is May 6th, 1983. That is a very bright light but definitely a dubbed in sound because the SA120’s did a faster pulse.
In the trailer for “Turning Red,” at 1 minute 56 seconds, there is a fire alarm that almost looks like an Amseco horn/strobe, but has a differently-shaped strobe and no “FIRE” lettering.
Oh yeah, interesting…neat how unlike most fire alarms in media they actually based it off an actual real-life device (though it appears to be on a ridiculously huge backbox, & as you said it’s in a bathroom).
I also have another picture from the same trailer, showing a similar alarm and a hard-to-see pull station (the lower red box) (This pic was in the deep background of a scene and therefore is very blurry.)
Also these alarms may or may not be designed after the Amseco devices, but it’s possible.
I’m pretty sure someone already mentioned the 270-SPO on The Office some years ago, but unlike you they did not provide a picture.
Not sure why the studio would have bothered with a break-rod, but maybe there was one in it.
Just now I noticed that the pull is mounted very high up, definitely too high up for ADA regulations, & the location it’s in is also somewhat odd (above a fire extinguisher cabinet no less).
More content: In the Big Nate short “Theater Antics”, at 0:27, you can see a Simplex T-bar that is mounted absurdly high on the wall, above the top of the lockers.