A positionable lighting unit for tools may have an LED light source powered by a battery with a control switch, all mounted upon a circuit board encased within a translucent and flexible casing. The control switch may then be activated though the casing without breaching the same so that a more sterile unit may be presented in those situations requiring sterility. The tool light also may have an adhesive, so it may be temporarily positioned according to a user's liking on a given tool. Emphasis is given to medical devices where a small field of vision and little room for movement may be prohibitive of desired lighting placement, but the light may be used on any suitable tool in any suitable medical or non-medical situation.