Incandescent luminaries is designed to exclude dirt, moisture and corrosive vapours from the interior of the luminaries and the conduit system. The glass globe-guard assembly is installed and/or removed as a unit, making it necessary to handle only one piece in relamping. For non-hazardous locations, shatterproof plastic polycarbonate globes are available for use with the 200 W series. Used in tunnels, building entrances and similar locations, where moisture, dirt, chemicals, vibration or rough usage are a problem.
