Alt-BEAM Archive

Message #05261



To: beam@sgiblab.sgi.com beam@sgiblab.sgi.com
From: Steven Bolt sbolt@xs4all.nl
Date: Saturday, 10 July 1999 8:12
Subject: Re: Light Bulbs for Solar Cells



>On Fri, 9 Jul 1999, Terry Newton wrote:
>
>> Here's a (I hope) simple question for you all:
>> What kind of light bulbs work best for panasonic solar cells?
>>
>> I was fooling around with my micro-picbot powered by a 3733 cell
>> (with evolving nervous networks on-board:)
>
>Ah!
>
>> and noticed I got about 30% activity time in sunlight, but only
>> about 4% active directly underneath a metal-hooded 75 watt bulb
>> that seems as bright or brighter than the sunlight was.
>
>Did you check with a lightmeter (or camera)? Our eyes nicely
>self-adjust, and sunlight is *very* strong.
>
>> Surely there must be a better substitute for sunlight.
>
>A while ago, this was reported:
>
> From: "Feser, Jason"
> To: beam@corp.sgi.com
> Subject: RE: RJP lighting.
> Date: Fri, 12 Mar 1999 11:17:28 -0800
>
> I've had success under flourescent lights by using a combination of
> both red and blue (hot & cold) tubes. This is a combo I used in
> hydroponic cloning and is the closest thing to natural light that a
> flourescent setup can crank out. A good ratio is 2 red to 1 blue.
> My bots move around pretty well under this light, but the buzzing
> from the ballast gives me a headache! I've never tried it, but I
> would assume that a gro-light would also work, as they are also
> supposed to produce something close to natural light spectrums ~
> although not as good as the red/blue combo.
>
>A good fluorescent mix may provide more usable light for the wattage.
>
>Best,
>
>Steve
>
> ----------------------------------------------------------------------
> # sbolt@xs4all.nl # Steven Bolt # popular science monthly KIJK #
> ----------------------------------------------------------------------
>
>
>


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