I have installed a number of these dimmer switches in my apartment But this last one refused to work correctly. I am just replacing a single on/off switch that controls a LED spot light that is aimed at a scone on the wall. It is not a three-way switch. When I hooked it up and turned the breaker back on, the led light in the switch did not light up and the LED light turned on but at about 50% intensity. Just for grins, I swapped the lead to the Casseta switch and got exactly the same behavior. Put the old switch back in and it works correctly. It is kind of hard to screw up the wiring on these switchs.Do I have a bad switch?