A properly installed insteon switch in this configuration will have three white wires connected together.
Wall light switch no white wire only red.
Twist the two red wires together and attach a wire nut.
How to wire a timer switch with no neutral connection.
Attach a wire nut.
Mark the white wire with a piece of electrical tape to indicate that the wire is now a hot wire.
Timer switches are designed to turn an electrical device on or off at specific times to automate the times when the device is in use.
The two travelers may be the same color or different colors but the switch itself will usually be marked.
If you have the access replace that romex in your wall with a 3 conductor one black white red and ground run black as your hot white as your neutral and red to your load.
The wall switch typically when a ceiling fan is installed the red wire is most commonly used for the light and the black is commonly for the fan motor.
One from the insteon switch one from the service wire and one from the load.
Or it could be the red wire is the wire going to the fixture and the black wires are the live wires.
I assume this is not full voltage but enough to power the leds.
The common wire on one of the 3 ways is connected to the incoming hot line.
In modern homes a red wire is typically used as a traveler for 3 way circuits or for fans or other appliances that require multiple power connections.
But it s not even close to full brightness.
A basic 3 way switch has a black wire or connector called a common and two traveler wires usually black red or blue.
When you see a red wire in a light switch box it can mean two things.
I did get a dim light when i connected the red wire to load and made sure the other switch in the house was on.
Attach the black wire from switch two to a contact on the light fixture.
It also should have a ground.
Chances are that wire goes up into a box probably in your light where you have access to hot load and light wires.
The red wire as a spare wire when a ceiling fan is not installed this spare red wire is insulated with electrical tape or capped off with a wire nut.
Take the white wire from switch two and twist it with the black wire from switch one.