Special purpose Infrared, Ruby fronted R125 reflector light bulb for a wide variety of commercial and industrial heating applications including animal husbandry. Features a ES-E27 Edison screw (27mm) base/cap.Constructed from boro-silicate hardened glass to help with resistance of thermal shock.Heat source light bulbs must be installed at least 0.5 metres away from other objects.Universal burning operation. Not suitable for household illumination. Suitable for dimming. Protect light bulb from contact with liquids/humidity to prevent breakage due to thermal shock.