[permaculture-oceania] Sunlight into buildings

[Russ Grayson]

Hi Penny...
I wonder if the light pipes are a different thing to the light domes? I have
seen the domes installed in buildings - where they certainly do deliver
needed light into dark areas - and on sale. They work by reflecting light
from a hemispherical, clear dome on the roof, along a reflective tube and
onto a diffuced in the ceiling.

Are the light pipes more a kin of optical cable (used as a medium to convey
digital data to users by encoding it in laser bursts at one end of the pipe
- like those broadband cables strung along our streets) in that they
transmit light through the cable material itself?

...Russ

On 10/7/06 5:08 PM, "P Ferguson" <pennyfer at bigpond.net.au> wrote:

>> From the discussion on light pipes:
> MARYKE STEFFENS, REPORTER : Light pipes like this one have actually been
> around for years, and they're a pretty simple concept. Light comes in through
> the roof and out the bottom into your room.
> 
> I have had those small round light domes in two houses and have found that
> while it gives light it also transmits heat as well - far too much in summer.
> Heat in winter might be an advantage but not in summer.
> 
> Can anyone recall what those heat collectors were called in the early days of
> solar energy?  Set at an agle below a window, they collected heat and it
> flowed into the room behind, and the vent could be closed in summer.
> 
> P Ferguson
> Illawarra NSW
> 
> 
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