Don Wiss wrote:
I have a skylight shaft that I've like to maximize the light coming
down. At the bottom is a stained glass window. I could paint the
shaft sides gloss white. But what about silver? Is there some
reflective sheet metal that I can buy that is even better? A glass
mirror would probably be a bit difficult to get up there.

Thanks, Don donwiss at panix.com.

Or a sunlamp in the shaft.

Hmmm. Can one get a REVERSE photocell?