The overhead crane spot light puts a huge red or blue spot on the floor or on anything it passes over. They are used for illumination and ensure the safety of your employees. They also serve as a warning sign in areas where the crane is used to lift heavy loads. These lights also help with positioning, which makes the job of crane operators easy. Popular configurations include: a single light to highlight the area near the hook, a double light, serving as a leader and a trailer and the quad light, which can form a box around the hook or item being lifted.