A block that can change the direction of a beacon light beam when aligned with it. You can choose the direction by tapping on one of the block's sides. If you tap the side the beam is coming from, it just stops the beam from passing through.
When aligned with the beacon it activates like a redstone power source. You can also select it to work every time a beacon does not contact it. (Like a daylight sensor can be selected to work when daylight isn't present.)
A glass block that gives you an option to hide your light beams by making it invisible. Invisible light beams can regain visibility if it passes through normal or colored glass.
Works the same as Ultraviolet Glass but makes the light beam blockable by players and mods. (Like how the gold pressure plate is a more weight sensitive version.)
I feel this could be very exciting and do so much for the redstone community in terms of long distance communication between devices.