QE QUALITY cold storage surface lamp port are vapor proof and made of aluminum die-cast base and grill. Finished in epoxy powder coating paint for long life, the thick glass globe is tempered and defused. Socket is porcelain and lamp source features standard max wattage. Protection grade is IP44 and is designed to work up to -50 degrees Celsius / -58 degrees Fahrenheit. Conveniently individually boxed and packaged.