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re: solar assisted interior lighting
10 mar 2002
n. thornton wrote:
>hi nick.
hi n.,
>with cfls i would keep maybe one incandescent in circuit for every 4
>or 5 cfls when dimming them. cfls use inductors, the fil lamp will
>soak up any inductive kick, which dimmers object to.
philips says these are usable with ordinary incandescent dimmers...
>yep, cfls cost way less when you take the leccy into consideration.
>calculate the money and take that to the aesthetics committe before
>they moan, and ask them what do they think they could do with the
>money saved?
that's in the works. the aesthetics chair looked at the cfs today and
said "looks fine to me, but we will have to talk with other people."
>...why 19:99? we pay 3 quid each here.
these are the new philips marathon _dimmable_ 23 w 1500 lumen cfs.
>> >if its 20' away, why use a flat mirror? 2 or 4 flat mirrors giving x2
>> >or x4 concentration would surely achieve more.
>>
>> the same amount of light at greater cost, with 2-4x more motors...
>that's not what i meant here. make up a single relfecting unit from 2
>or 4 flat reflectors. the multiple reflector is tracked as one piece,
>and thus gets 4x the light thru your little window at no extra cost,
the window is about the same size as the mirror, which should completely
illuminate the window, with some light left on the outside wall. this will
create an unchanging patch on the ceiling with the windows outline, like
a self-aligning gate on an ic. duane says individual heliostats usually
don't concentrate, because the focal length would have to change with the
angle of the sun.
>> >you would achieve still more energy saving by adding a flat mirror
>> >under the window to reflect skylight in. at first glance it doesnt
>> >look so eficient, but...
>>
>> this art show requires more pizazz, imo. have you tried this on the north?
>
>it works great with no direct sun...
probably better in the cloudier uk. this morning was clear, with about
10% cloud cover, and i measured 756 fc in direct sun, vs 48 in my own
narrow shadow.
>as for pzazz, i was thinking use both. just add the skylight for extras.
i would like to lighten the turf outside our 3 6'x8' glazed south-facing
double doors. maybe white pebbles or concrete. or whitewash the grass for
the art show, with the greenhouse stuff that lasts until freezing weather.
nick
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