Roy Tang

Programmer, engineer, scientist, critic, gamer, dreamer, and kid-at-heart.

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How do streetlights know to turn themselves off? Each one has a timer?

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Photosensitive switch, those little cylindrical things on top .
Bat di ko naisip yun, im like the worst engineer lol

til Thought that they were manually turned on and off by an operator or were toggled by a timer.

LOL. I've only guessed it before, but then I've observed streetlights turning themselves on when clouds are heavy during daytime, and turning off briefly when lightning flashes overhead :p
This reminds me of that elusive one-quest-per-d ay in WoW where a wizard would ask you to switch on the lights of Dalaran at around 6pm game time.
What? All the while I thought it was the barangay tanod or something who did all the switching on and off! :)
Roy Tang diba pinakita ko yung sa kanto namin na pag may dumaang tao, namamatay
Hala! Wag dumaan sa screet light na yun, may namamatay