Has anyone heard of hybrid lighting.
Its a method(I think developed in Japan) where a big silver satellite
dish is place onto a roof then opric fibres tranmit the sun light and
transport it to room below. I understand that this reduces lighting
power consumption in large sky-scrapers.
I'm interested to use this in my house to bring sunlight into the east
facing rooms. I don't have the space to install a sunpipe but maybe
optic-fibres will do.
I'm interested to know if anyone has experience of this technology.
Theres also a much simpler cheaper technology that does something
Because the incoming reflected skylight goes up to the ceiling, this
roughly method doubles the light level in a room.
If you want you can then add some tronics to a fl light to modulate it
so it maintains the chosen light level as daylight dims, thus saving
energy. You might find other ways that can save more energy than that.
In a skyscraper the total lighting load is pretty large, so it becomes
There's another way: using 'light-pipes' aka 'sun-pipes'. These are a
large-ish diameter 'flexible' pipe with a highly reflective (mirrored)
interior. The pipe protrudes through the roof - capped with a transparent
dome- and light bounces from side to side and eventually downwards to spill
out, and illuminate rooms, corridors etc. etc.
I've seen some light pipes with an integral electric light fitted so one
gets illumination after sundown. Also, some systems are fitted with a
fresnel lens at the top of the pipe to bend the sun's rays down into the
pipe. AIUI, the system was developed in Australia - [could just be the first
place I heard of them]- and curiously they seemed to work (best) on the
North facing roof sides :)
It sounds like you may have misunderstood the application. The idea is
to reflect in skylight, not sunlight, thus it works equally well
regardless of aspect.
If you were trying to capture heat, that would want south facing
As for looks, large reflectors arent good, but small ones are fine, and
can act as an exterior window sill. As energy efficiency presses
forward its quite possible that reflective sills may become standard
some day. Whether they'll be 4" deep or 6-8" who knows.
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