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Posted by bealiba on July 11, 2008, 12:18 pm
 
On Jul 11, 7:39 pm, phon...@025379386.for.email.address (Eric Sears)
wrote:

Given Seattle cloud could be the biggest factor. They do get a bit of
rain.


I would lean towards a Gell battery and led lamps.



Posted by Eeyore on July 12, 2008, 1:29 am
 


Eric Sears wrote:


A truly smart system could monitor the battery charge level and select
whether to switch on say one or two luminaires.

Graham


Posted by Eeyore on July 12, 2008, 1:26 am
 

Eric Sears wrote:


1.6 ! It doesn't state if it's hours or kW though. You may need to dig
deeper.

http://howto.altenergystore.com/Reference-Materials/Solar-Insolation-Data-USA-Cities/a35/

I hope that covers overcast days !

Graham


Posted by spaco on July 11, 2008, 3:57 pm
 If you are talking about a 15 watt incandescent lamp, consider a 5 watt
compact flourescent lamp that runs on 12 vdc instead.  That'll cut your
costs a lot and you'd be surprised at how much light one of them casts.

Pete Stanaitis
----------------

Saki wrote:


Posted by Eeyore on July 12, 2008, 1:21 am
 

Saki wrote:


Well for starters, the biggest saving you'll make is to use an efficient
light source.

What do you mean by a "15 watt bulb (AC)" ?

Secondly, do you need to do this all year round ?

Graham


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