I'm aware of the flicker and cycling, but what other signs are there?

Had a capacitor in a mercury vapor fixture blow.  Not a fan of oil filled caps after that 

yeah, I found on Goooooooooogle Maps, an abandoned portion of Highway 91 (ended in California) around here, right on a hill next to Interstate 15!

Even the abandoned roads can be illegal ! If the cops saw anyone on the abandoned road near me (now gone) they'd come pay them  a visit !!

 My friends property in Northern Maine was abandoned for years before he got it . He's finding various open manholes/storm drains of which the covers were removed/stolen that have since been overgrown with vegetation ! depending on the size , find one of them unexpectedly and you'll either break an ankle or leg or fall to the bottom !!   

Yeah, plus, sometimes, in most states, it's illegal. I like to find abandoned roads

 Been thru many abandoned buildings and properties in my time .

 Just be careful and don't get caught !!    There's a lot of ways to get seriously hurt in abandoned places !!

 I think you're also required to credit the creator of the original photo .

Probably the Pemco Heads with the U-Bolt slipfitter.  Extremely durable with a very good ballast, very weather proof. Never ran into any with issues with stuck screws.  If you're missing the hardware for it and have one, you don't need to make a crazy bracket, just the properly sized U-bolt and you're done.  It's one of those lights that could be missing a bunch of parts and you can just get them when I'm still not being terrible. I do also like the band on it so that you can adjust how the light shines rather than left to right. With any NEMA refractor. Otherwise, the General Electric Form 79VR just because of how amazing it looks.

Yeah I think that would be categorized as miscellaneous, if there’s no lights then it’s off topic.

I've thought about posting a few images of vintage street images that contain street lights. Is that possible?