| 摘要 |
A lighting system, including a light source having a light bulb and a reflector, has an interference filter applied to a portion of the outer surface of the light bulb. The interference filter has a high transparency for visible light and a high reflectivity for infrared radiation. The area of the light bulb that is permeable to infrared radiation is adjacent to an area of the reflector which is made to be infrared-radiation transmitting.
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