This special purpose 1300w infrared heater light bulb with an R7s cap is designed for use within infrared heaters, patio heaters and drying applications. Due to their short wave infrared radiation they provide instant heat to localised areas.As with all linear halogen light bulbs, it\'s important not to touch the glass part of the light bulb with bare skin while installing the lamp. Natural oils from your skin can cause the light bulb to fail prematurely. If you do touch the lamp, remove the oils from the glass by using alcohol.Fitted with R7s round (7mm) caps to each end.Not suitable for houshold illumination. Intended for heating applications.