seems to be a Cooper thing. Although I've seen this happen to a M-250R2 too.

Over here AEL 125s are the most common light to be tilted like that.

Ahh the only 125s we have here are the Thomas & Betts ones from the 90s and the few we have seem to do okay. Do the new 125s have a 4-bolt fitter or 2-bolt? The OVZ and M-250R2 are 2-bolt. (though the 80s M-250R2s are 4-bolt).

slipfitter bolts not tight enough?

Maybe. Or if the arm was just on edge of a leveling step and it gets some vibration the arm can fall off the step it was on and then the light is loose. I've seen this happen to OVZs and M-250r2s here which both use the leveling steps. Never seen it happen to a 4-bolt light or a fixture with a rocker instead of leveling steps. Do these newer OV-25s have leveiling steps?

I'm not sure actually. I've never seen the inside of a Cooper OV-25 before lol.

Hmm, Darren would know since he's got one. I know the OVC, OVS, and OVM are 4-bolt. The newer coopers like the OVF/Y/D, OVZ, OVX, and OVH/G are all 2-bolt with the step-door design.

Oh yeah, Darren has a pic of the inside lol. Looks like it uses a 4 bolt fitter. I wonder what type of fitter does the fully Cooperized OV-25 use.

Haha I have a photo of a Model 25 that was like that too We had an OVX as well. The problem was fixed half a year ago, the city decided to replace it with an AE 115

Hmm not sure. I don't even know what the OVL uses since I've never seen a pic of one opened. I would imagine it uses a 4-bolt fitter (well it makes sense anyway) but all the other Cooper fixtures are two-bolt. For AEL you can order either one for all their cobraheads except the 327, which is 4-bolt only. For GE, the 70s M-1000 had the 2-bolt rocket fitter like the M-400A and other lights of the era. So I guess a 2-bolt large fixture is okay but I would want the security of the 4-bolt fitter personally. For the current GEs, the M-250A2/R2 are 2-bolt, the M-400A2/R2 are 4-bolt, and the M-400/M-400A can be ordered in either one.