Indicator Lights are wireless coloured lights (They emit a faint white light when on. The bulb colour can be changed). They can only be turned on/off by using a Wireless Redstone 64, Wireless Button or Wireless Lever. By default they are on. Right click on one to change its colour. Right Click with a Hammer to change its orientation.

Note: When you place an Indicator Light it will "Stick" to the surface you are aiming at.