How do you thermally manage the light fixture when there is no air?
There is no way for the heat to dissipate, so will the fixture heat up indefinitely? Below is data from an experiment we performed with the luminaire. We put the light in a cardboard box and filled the box with paper – for insulation. We tried to simulate vacuum operation with the setup by eliminating/minimizing convective heat transfer. We turned the light on for 20 minutes and recorded the temperature of the light’s housing in the middle of the cylindrical section of the housing. We also watched the cooling of the light after we turned the light off in order to get an idea of how well the box was insulated. It looks like the housing temperature increased by about one degree F. per minute. What is the maximum temperature for the surface of the housing for the luminaire? It appears as if the box was adequately insulated. During the first 20 minutes of cooling the temperature of the housing decreased by less than two degrees F.