This clearance lamp is a rear-position or marker light for agricultural tractors and self-propelled machinery. It is mounted on the outer extremities of the machine to indicate its width and presence to other road users. The lamp operates on a 12-24 volt electrical system and is wired into the machine's lighting circuit. When the lamp housing is cracked or the lens is damaged, moisture ingress causes bulb failure and reduces visibility of the machine's outline. The housing is sealed to the mounting surface with a gasket; if the gasket is missing or compressed during reinstallation, the seal must be replaced to prevent water entry.