An illuminating device which utilizing multiple colored Light Emitting Diodes (LED's) is disclosed. The device incorporates a voltage regulator to allow it to operate on a wide range of voltages typically found on aircraft electrical systems. Additional controls are provided for brightness or dimming controls, and for the selection of the color output. The device includes a mounting clip for attaching it to a boom microphone on an aviation headset, though it could be used in a handheld manner as well.