I don’t know about streetlights, but I do know about electrical fields around people. A year or two back, I was in my favorite comic store and discovered a novelty Star Trek gift card that, when opened, played the classic Star Trek fight theme as played when Kirk and Spock dueled to the ‘death’ on Vulcan. I found it amusing and cheap, and purchased it. Later, finding the card on its own no longer amusing, I disassembled the card and removed from within the computer chip, speaker, and simple pressure button. It was a portable little thing, and when the button was pressed and released it played that obnoxious midi file at startling volume. I got in quite a bit of trouble at school with it.
I had set it up on my stairs one day, and was trying to work out a way that when people walked by it would go off. I hadn’t figured anything out yet, but when my mom walked down the stairs, it went off.
I assumed that I had accidentally set it off, but over the next few weeks her presence would set the thing going again and again and again, until finally I held it in my outstretched palm, walked toward her until it went off, backed away, and tried again. Their is no doubt about it, my mom somehow triggers this simple little electrical device simply by coming within three feet of it. The results are clear, observable, and repeatable. Or at least were, until a year ago when the speaker wire soldering came loose, and I threw the device away.
My theory is that she emits some form of low-grade magnetic field, and her moving withing a certain radius of the chip, or vice-versa, sets enough of a charge in the wires to initiate the midi file. However, I have not yet been motivated enough to find or devise a meter that could gauge an ambient magnetic field. If you could find a cheap device to do so, or arrange for my mother to be brought to a city location where street lamps are more common to test this thread’s main theory, perhaps we could help settle this discussion once and for all.