Add spaces: Thespecimenisplacedinaspecializedchamberwithtemperaturesdownto-50C.Thetemperatureinthechambershouldbefivedegreeslowerthanthelowestambienttemperature(Tavalue)specifiedbythemanufacturerfortheluminairebeingtested.
The specimen is placed in a specialized chamber with temperatures down to -50C. The temperature in the chamber should be five degrees lower than the lowest ambient temperature (Ta value) specified by the manufacturer for the luminaire being tested.