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Posted By: tonyNormal roof window with a light well or even a normal window. Borrowed lights can work as effectively as a solar tube too.
Posted By: j40The other factor regarding the Solatube specifically is that the done on the top has some special way of getting light that comes in at an angle to be thrown down the tube.
Posted By: j40I have seen a lazer pen directed at the dome and not pass through- instead thrown downwards- so from eye witnessing- yes it does work.>
Posted By: arthurSince windows are inevitably weak points in a well insulated building unless solar gain can be stored (at least overnight but preferably interseasonally) the question is should they be there at all and especially in the roof since heat rises. Natural light is perhaps an unjustifiable luxury. Energy saved in electric lighting may not compensate.
Posted By: arthurDo many passive buildings of roof windows? Don't they tend to arrange windows carefully on the south side and minimise them on other surfaces?
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