Project a box of lines or dots of light from an overhead lift onto the floor to help prevent worker injuries caused by crane hooks. Each light features 24 LEDs that shine a bright beam onto the floor to warn that a hook from an overhead crane is in the area. Overhead warning lights also make positioning the crane hook and moving objects easier for crane operators, who can use the light as a point of reference for their hook position. Install the lens covers to switch the light beams from dots to lines. Mounting brackets are adjustable so placement of the warning lights is simple and easy. Kit includes four lights that share a single power supply.