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Cake day: June 23rd, 2024

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  • Yes but by reflecting >95% of the light, it does not get nearly as warm as what the light would otherwise shine on (typically gets dispersed all over the room, very little gets back out the window). Also, if placed outside a multi-layer window (which you should or the window may overheat and crack), the heat exchange to the inside via convection/conduction is stopped, only radiation remains, and the 80°C foil radiates way less than the 6000°C sun.