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To: SWAMPSNIPER
Full sunlight is about 100000 lumens per square meter at maximum surface intensity, with less at dawn and dusk and far less < /s> at night. A four inch diameter light pipe will get a maximum of 810 lumens of sunlight. That's similar to a 60 watt incandescent. So he's essentially putting in 4 inch diameter skylights.
15 posted on 03/08/2011 8:52:15 AM PST by KarlInOhio (Washington is finally rid of the Kennedies. Free at last, thank God almighty we are free at last.)
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To: KarlInOhio

Allowing the radiation area to protrude into the room seems to be the advantage offered.


19 posted on 03/08/2011 9:01:47 AM PST by SWAMPSNIPER (The Second Amendment, A Matter of Fact, Not a Matter of Opinion)
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