The authors presented the Photon Recycling Incandescent Lighting Device (PRILD) in a paper published in the journal Science Advances. In the new lamp, the scientists replaced the filament. Instead of a standard tungsten, a two-layer all-ceramic strip consisting of a Janus thermal emitter, carbon nanotubes and hexagonal boron nitride was used. In addition, the glass bottle containing an inert gas was replaced with a ceramic corundum resonator. The design also has a quartz window with a special filter that transmits visible and reflects infrared and ultraviolet radiation.
The efficiency of the lamp is over 25%, its efficiency is about one and a half times higher than that of a conventional lamp, and its service life is more than three times.
Source: Ferra
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