[Greenbuilding] Battery charger--works on standard Alkaline

Benjamin Pratt benjamin.g.pratt at gmail.com
Thu Jan 5 08:01:59 CST 2012


Noticed this on amazon, and it seems to be good.
http://www.amazon.com/dp/B004AHPHAM/ref=pe_113430_22293050_pd_re_dt_dt1
Looks like a good charger for rechargeables too. It has an indicator light
for each battery--something surprisingly hard to find these days.
Ben

On Wed, Jan 4, 2012 at 11:42 PM, Jason Holstine <jason at amicusgreen.com>wrote:

>  Lynelle,
>
> There are some decent GU10 LED bulbs that we’ve come across and a couple
> of them are pretty popular. We’re waiting samples of a new line that is
> also made in Tampa, Florida, USA, instead of China (a nice bonus).
>
> These guys will typically cost about $29/ea. But my
> late-night-back-of-the-envelope comes to 3.096 kwh of savings over a 12
> hour period (slashing from 50W to 7W = 43 watts saved x 6 units x 12
> hours). So at US$0.12/kwh = $.371 saved per day or $11.14 saved per 30 day
> month. So that’s about a 15 month payback. Someone with a more alert brain
> may need to back up my math.
>
> These LED units will get warmer than other LEDs but nothing compared to a
> halogen.
>
> One caution: GU10 fixtures all are wired for halogens and all that extra
> load. We’ve run into conversion problems b/c the transformer may require a
> load that would be much greater than what the LEDs will pull. As in wanting
> 700 watts but you’re only pulling 70 watts—not even close. If you want to
> dim them it becomes really tricky. If you don’t need to dim, it’s much
> easier.  But see if you can find out if there’s a documented minimum load
> the transformer calls for.
>
>
> *Jason Holstine
> *
> Amicus Green Building Center
> “Sustain Your Space”
> Member - USGBC, GreenAmerica, NARI, NAHB
> e: jason at amicusgreen.com
> w: www.amicusgreen.com
> p: 301-571-8590
> tf: 866-587-9140
> f:  301-571-8597
>
>
>
> On 1/4/12 8:45 PM, "Lynelle Hamilton" <lynelle at kos.net> wrote:
>
> Does anyone have info on LED GU10 replacement bulbs?  I have a (egad)
> Halogen light in my DR.  Because it's also workspace, it's on 10-12
> hours/day on cloudy days. Thing uses 6 50W GU10s. I suppose the bulb
> heat contributes to the ambient warmth, but my masonry heater does a
> much better job, so this isn't a redeeming feature.
>
> Yet, I'm loathe to invest $180 into 6 LED GU10s (at 35W per) without
> some idea of how they actually compare.
>
> Has anyone used these or similar?
>
> Thanks!
>
> Lynelle
>
> On 04/01/2012 1:02 PM, David Bergman wrote:
> > Hi Benjamin,
> >
> > My first question would be: how often is the fixture turned on? If it
> > is just an occasional use, then it may not be so important to change
> > it to energy-efficient bulbs. Plus your payback period will be much
> > longer.
> >
> > If the fixture is one that is on for longer or more frequent periods,
> > then you're right to seek an alternative. There are some candelabra
> > socket CFL's out there, but yes, they mayy be bigger and they probably
> > will not be dimmable. Also be aware that, if you are currently using
> > clear incandescent bulbs, a CFL will look different -- more like a
> > frosted incandescent.
> >
> > There are LED candelabra bulbs available, and some are available in
> > warm color temperatures (to answer Reuben's point). Also, not all LEDs
> > are dimmable. But the real issue is that the brightness is lower. As
> > far as I have seen, the maximum brightness models currently available
> > are equivalent to around a 15 or 20 watt incandescent.
> >
> > If the light is on only occasionally, and especially if you dim it,
> > you may be better off -- at least for now --sticking with the tungsten
> > bulbs.
> >
> > David
> > David Bergman  RA   LEED AP
> > *DAVID BERGMAN* ARCHITECT / *FIRE & WATER* LIGHTING + FURNITURE
> > architecture . interiors . ecodesign. lighting . furniture
> > bergman at cyberg.com _www.cyberg.com_ <http://www.cyberg.com/>__
> > 241 Eldridge Street #3R, New York, NY 10002
> > t 212 475 3106    f 212 677 7291
> >
> > At 12:06 PM 1/4/2012, Benjamin Pratt wrote:
> >> The light that is most often on in my house is a 5 bulb fixture in the
> >> dining room (burning 40 watt mini-base tungsten presently). This is
> >> the one fixture in the house that does not have CFLs in it. My wife
> >> likes the warm look of tungsten, especially in this location, and i
> >> have been unable to convince her to switch to CFLs. Also, they are
> >> larger in size , and the shades that clip on each bulb may not fit.
> >> The ideal bulb would be the same size as the tungsten bulbs, dimmable,
> >> and a warm color. This may be a good opportunity to switch to LED's,
> >> Any recommendations as to what bulbs to get and where to get them?
> >> thanks!
> >>
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> >
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-- 


b e n j a m i n p r a t t

professor art+design
the university of wisconsin stout
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