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re: best reflective surface for skylight shaft?
31 jul 2004
b wrote:
>i think glossy white paint or silver or even mirrors will not pull more
>photons out of the sky than plain white paint. white paint will do the job.
sure, but i'm looking at a table that says white paint has 80% reflectance,
vs 86% for aluminum foil and 92% for aluminized mylar. the mirrorlike mylar
can minimize the number of bounces in the shaft, compared to diffuse white
paint, further increasing the intensity at the bottom. a south-facing
reflective sunscoop over the skylight can also help.
nick
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