... , in the case of red-coated far infrared lamp, the red-coloredcoating prevents the inner heat from being emitted outward, so the ... , and heat the inside evenly, they can be used for moreefficient heating of painting, food, or human body. Far infrared rays ensuremore ... , in the case of red-coated far infrared lamp, the red-coloredcoating prevents the inner heat from being emitted outward, so the ...