This works exactly like Remote Chests, only it transmits light states. You'll need at least two redstone based light blocks (redstone lamp or any copper bulb), two item frames, a redstone torch, a regular torch, and an anvil. One lamp will be your 'source' light, while the other will be your 'mirrored' lamp.
Redstone torch (source) lights are lamps that reflect a light state to the regular torch (destination) lamps on a given channel.
The name given to the redstone torch and regular torch will be the channel. This is how you specify exactly which lamps will be synced. This way, you can have multiple lamps mirror a source. You only need one redstone torch to reflect a light state to any same-named regular torch lamps.
Light states will be mirrored from the closest source lamp of the same channel. This means you can have multiple source lamps with the same channel name. But only the closest source lamp will be used for each destination lamp.
If you hook up the destination lamp with a comparitor, then you can have yourself a wireless redstone application.
You can have MULTIPLE source/destination lamps that have the same channel name. The source lamps' light always reflects to the nearest same-channel destination lamp.
Perfect for making an on/off switch to mob farms. It works cross-dimensions, too.
The source lamp and destination lamp must be in loaded chunks to function!
And you're done building a remote lamp. It's ready.
See my other mods