The Arcolectric 1041 is used on all proton guns and trap pedals. There is a clear Arco used on top of the gun next to the grill that blinks and a red on the rear instrument bar known as the "slo-blo". A red is also used on the hammond project box in front of the ITT relay which is never seen lit. These indicators either come with incandescent or neon bulbs installed. In Ghostbusters the packs use 12V incandescent models, however most hobbyists re-lamp with 3mm LEDs.
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