Still looking for info about these lights...

So, I've got four of these lights (3 pictured, obviously)...I've had them for several years, but have never been able to figure out what they were used for or what they came off of...I posted a pic of them a while back on here asking for info...Received a ton of responses, but nothing for certain...Thought I'd try one more time...If you happen to have any idea what they came off of, please let me know...Thanks!