Lighting alarm door

DaneTheBeast on reddit asked Is no one using this feature anymore?
In regards of wired torches. I replied:

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I use it with colored torches: If the (per pressure plate activated) actuated entrance wall is open, all the red lights are on, so i become alerted to close my base. If everything is closed the lighting switches to normal (in my case blue)

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Lighting alarm door

If you have awesome ideas for wired torches, let me know! :)