This is not a pinball question. I have an old 1950's beer sign that uses three incandescent standard 7 watt night light bulbs. With the incandescent bulbs it works fine. When I try to use an LED replacement (the A/C non-dimming LED's that look exactly like the incandescent bulbs that are 7 watt equivalent), they do not work. Why? I looked at the wiring and it is straight forward. All bulbs are ran in parallel from the plug wire feeding the supply. There is literally nothing else in the sign that alters the current in any way (no resisters, capacitors, ballasts, nothing but direct wiring to the plug).

That being said, on the new LED A/C replacement bulbs that fit in the night light 7 watt receptacles, will they still work if HOT and NEUTRAL wires are flipped on the socket? I don't see why this would matter at all with A/C power since I imagine there is simply a rectifier inside the LED bulb base and the current essentially flows 'both ways' in a sense.

If anyone has any advice please let me know. Thanks!