Police siren hotkey question

I hosted a private server for messing around with mods and noticed that police siren works by pressing E (like in default game)
However I usually play on this one server where when you press Q it turns on the lights, LAlt turns siren on and R changes the sound of the siren (also when lights and siren is off, R also does siren while holding it). Any idea what script they were using?

They maybe using something called Luxart

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Perfect, thank you (from description I think it should work)