street lights

I noticed that a lot of dark street lights seem to turn on when I walk under them. I'm pretty sure they're not designed to do this. Any ideas why this happens?

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Maybe they have dead lamps which are cycling on and off as the arc tube overheats and cools don again.

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Andrew Gabriel

I'm not sure, are you possessed?

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John Waalkes

In my neck of the woods the exact opposite happens. The lights turns off when a pedestrian or car is nearby! This happens on residential streets and on the freeway.

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Michael J. Astrauskas

In particular, high pressure soduim lamps (golden color, very common in the US) fail by cycling on and off.

-- bud--

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