"dpb" wrote in message ...
...

Indeed...got me thinking for the old tin machine shed w/ no windows nor
wiring. Have a bunch of old clear glass (as well as green and various
others) telephone insulators. May just try one of them for the
purpose...similar to

http://www.natsulators.com/insalbum/photos/107arm010clr.jpg

Cheap since have dozens of 'em from when we used to have to maintain own
lines for connection to Bell in town and strong enough to withstand SW KS
weather if will refract well enough to be usable light pattern.

I roofed my storage shed with corrugated clear PVC on the north side. It's
stiff enough to hold snow but too brittle to withstand acorns and developed
leaks. Floppier clear Suntuf polycarbonate panels with trapezoidal
corrugations fitted right over the PVC ones and stand up to falling debris
better. Together they are a good combination of stiffness and toughness.

The colored PVC panels are tougher initially than the clear ones though the
green panels I installed a decade ago have become brittle.

jsw