Luminaires contain lamps which are significant heat sources. Many components in luminaires are sensitive to temperature - for example plastic glazing, chokes, electronic components and cable insulation. To ensure that safe operating temperatures are not exceeded, extensive testing at all vulnerable points is required within a specially constructed, draught free enclosure specified in BS 4533. The enclosure measures 2.5 x 1.5 x 2.2m high internally and will take 2 large luminaires at one time. Thermocouples are used for highly accurate temperature sensing.

The test equipment is designed to accept a Calorimeter which allows the measurement of heat recovery, light output and pressure drop for air-handling luminaires.