Slimline, non-jacketed infrared heat lamp with ruby coating reduces glare to the eyes and provides instant heat when turned on. It uses short wave infrared technology which converts most of the electrical energy in to heat, with a lifespan of up to 5000h this is one of the most efficient on the market. This makes a perfect patio heater replacement lamp or it can be used for industrial applications including paint drying. The lamp uses R7S cap for quick and easy installation.