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[dspiffy]

Some scary stuff in this thread, particularly the "electrician" that switched the polarity!

Switched neutrals are legal last I checked, but uncommon and not a great idea.

Solder and cloth tape splices predating wire nuts is true. 

Any dimmable LED bulb should be safe on any switch, but it may not function well.

Any non dimmable LED bulb should be safe on any switch that supplies full voltage.

Most of them use switching power supplies.  The worst thing you'll get is blinking.

[Brian H]

A large number of dimmable LED bulbs will not work on an X10 two wire wall switch. Since it gets it power through the load and made for incandescent loads only.
Some glow dimly, some only work with the local paddle, go On or Off but not both status and some make so much noise. X10 stops controlling the switch completely.
LM465 Lamp modules {both older and Soft Start} usually work better.

[racerfern]

I stumbled across this device that might be worth doing an experiment with. https://www.thesmartesthouse.com/collections/fibaro/products/fibaro-bypass-2-fgb-002

I don't have X10 installed in any lights right now, having switched over to z-wave, however I think this might give that little needed load to stop dimming/flickering issues.

[dspiffy]

I stumbled across this device that might be worth doing an experiment with. https://www.thesmartesthouse.com/collections/fibaro/products/fibaro-bypass-2-fgb-002

I don't have X10 installed in any lights right now, having switched over to z-wave, however I think this might give that little needed load to stop dimming/flickering issues.

I wonder what is in there!

[dave w]

I stumbled across this device that might be worth doing an experiment with. https://www.thesmartesthouse.com/collections/fibaro/products/fibaro-bypass-2-fgb-002

Interesting. Maybe a L-C network, passing just enough current to keep the dimmer alive. One owner on a blog, said it did not dissipate heat, which makes me think is  probably more than a simple resistor.

[Brian H]

Sales page indicated:
Power consumption: < 1.4W

I would also think it maybe a resistor. So it can pass some current when switch is Off. To keep the electronics supplied with some power.

[HA Dave]

I stumbled across this device that might be worth doing an experiment with. https://www.thesmartesthouse.com/collections/fibaro/products/fibaro-bypass-2-fgb-002

According to it's specs.... it's really small too. I think it might fit the box with the switch.... maybe.

[Knightrider]

I don't see how it could be in the same box as the switch. Maybe the same box as the light socket

[Brian H]

The sales page and downloaded instructions.
So it it across the load.
I agree with Knightrider. It shows it is in the load fixtures electrical box.

[Knightrider]

Can't shunt the load from the switch. (On two wires)

[racerfern]

If you have a neutral in the switch box, you could go from load to neutral, if not then at the light is how I read it.

[Knightrider]

If I had neutral at the switch, I wouldn't need this shunt.

[HA Dave]

The sales page and downloaded instructions.
So it it across the load.
I agree with Knightrider. It shows it is in the load fixtures electrical box.

Can't shunt the load from the switch. (On two wires)

I don't know what I was thinking..... just wishful thinking I'd guess.

[racerfern]

If I had neutral at the switch, I wouldn't need this shunt.

Depending on the bulb(s) being used you still might need it. Too many variables with so many different bulb manufacturers.

[dave w]

Depending on the bulb(s) being used you still might need it. Too many variables with so many different bulb manufacturers.

If the switch had a neutral, what function would the shunt be providing?