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Re: [EVDL] LED Taillights - a money saver in gas cars? -rangeextenderin EV's? - an an

That and general coolness.
Check the archives. Taillights/running lights/turn signals don't make a
lick of difference in EV range or gasoline mpg.

Headlights also. The range lost over the possible runtime- generally
well under an hour- on 40W headlights is trivial.

LED headlights are now possible due to some recent developments in
technology, although you'd really have to know what you're doing (there
are only a few parts potentially capable of replacing headlights) and
honestly while it's more efficient than halogens, it's not wildly more
efficient and the lost range from running halogens is negligible to
begin with. It would be expensive and of questionable street legality.
But again there is certainly a coolness factor.

Danny

----- Original Message -----
From: Cor van de Water <[email protected]>
Date: Tuesday, September 25, 2007 3:16 am
Subject: Re: [EVDL] LED Taillights - a money saver in gas cars?
-rangeextenderin EV's? - an analysis
To: Electric Vehicle Discussion List <[email protected]>

> I think the greatest virtue of LED lights, after savings in
> very energy critical applications like solar-lights, is in
> the field of shock-resistance and longevity.
> Never needing to replace a burned out light can be a much bigger
> issue than saving a few watts in a vehicle that is designed to
> produce 100,000+ Watts at the flick of a foot.
> I doubt that the LED lamp's energy (gasoline) savings will be
> noticeable.
> I changed the lights on my bikes to LEDs, because the bulbs
> kept rattling the filaments apart.
>
> In an EV, you may increase your range, but calculate in the
> order of fractions of a percent.
>
> Cor van de Water
> Systems Architect
> Proxim Wireless Corporation http://www.proxim.com
> Email: [email protected] Private: http://www.cvandewater.com
> Skype: cor_van_de_water IM: [email protected]
> Tel: +1 408 542 5225 VoIP: +31 20 3987567 FWD# 25925
> Fax: +1 408 731 3675 eFAX: +31-87-784-1130
> Second Life: www.secondlife.com/?u=3b42cb3f4ae249319edb487991c30acb
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> On Behalf Of (-Phil-)
> Sent: Monday, September 24, 2007 10:49 PM
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] LED Taillights - a money saver in gas cars? -
> rangeextenderin EV's? - an analysis
>
> Or LED:
> http://fourtitude.rely.net/cgi-bin/artman/exec/view.cgi/6/1113/printer
>
> -Phil
> ----- Original Message -----
> From: "(-Phil-)" <[email protected]>
> To: "Electric Vehicle Discussion List" <[email protected]>
> Sent: Monday, September 24, 2007 10:15 PM
> Subject: Re: [EVDL] LED Taillights - a money saver in gas cars? -
> rangeextenderin EV's? - an analysis
>
>
> > Another interesting one is to switch to Xenon HID for the
> headlights.
> > A HID bulb is 35w versus 55 or 65w, so that's a savings of a
> minimum
> > of 40w!
> >
> > As an aside, they are brighter and if you won't see brightness
> > fluctuate because of 12v voltage fluctuation or sag.
> >
> > -Phil
> > ----- Original Message -----
> > From: <[email protected]>
> > To: <[email protected]>
> > Sent: Monday, September 24, 2007 9:40 PM
> > Subject: [EVDL] LED Taillights - a money saver in gas cars? -
> range
> > extenderin EV's? - an analysis
> >
> >
> >> This file is saved at www.herringshaw.com/led.xls Let me know
> what you
> >> think.
> >> In building my Electric Car (88 Mazda getting the Solectria
> treatment) I
> >> came across some LED taillight bulbs at Sherco-auto.com. You
> should>> check them out - connectors and other stuff for good
> prices. ANYWAY, So
> >> I wanted to see if there's a financial payback on these lights
> in a
> >> ICE vehicle, assuming of course that these could extend the
> range on
> >> an EV at night, which of course there is no price on!
> >>
> >> My car has 4 taillights, so I bought 4 @ $5 each (combo
> tail/Brake
> >> Light) Check out the file to change numbers and see if you come
> up
> >> with something different - with my analysis, if you drive more
> than
> >> 12.5K miles/year with
> >> your taillights on, you'll have a 20% payback. Put that into
> Gasoline>> instead of Diesel, it'll do even better. What do you
> think on the
> >> efficiency #'s?
> >>
> >> If you have to change a bulb anyway, then this is a no-brainer,
> but
> >> fun to
> >> analyze anyway. Make sure your Lens color matches the LED
> color - Make
> >> sure your bulb mount faces the bub toward the lens (not always
> the
> >> case, as in my car, so the LEDs are going into the Golf)
> >>
> >> Assumptions - All in Green can be changed (download the file for
> >> changeables)
> >>
> >> Conventional Taillight Bulbs 100 Watts [email protected] 27W (maybe 27 is the
> brake
> >> light, not the running light....)
> >>
> >> BTU/KWH 3414
> >> BTU/Gallon 130000 Diesel
> >>
> >> Alternator Efficiency 70.00% [Turning Motion into Electricity]
> >> Engine Efficiency 50.00% [Turning BTU's into Motive energy]
> >>
> >> $/Gallon 3
> >> Cost of Bulbs $20.00 4 - 27W Equivalent Bulbs
> >>
> >>
> >>
> >> Taillights Used Per Hour
> >> Watts used/hour 100
> >> Efficiency Reduced Watts 285.71
> >> BTU used /hour 975.43
> >> Fuel used/hour 0.007503
> >> $$/hour 0.022510
> >>
> >> Overall Vehicle
> >> $/hour @ 48MPG (TDI Golf) 3.75
> >> % of cost going to Taillights 0.60%
> >>
> >>
> >> Hours needed to drive in 1 yr to reach 20% Rate of Return 177.70
> >> Miles Driven @ 75 MPH
> 12438.98>>
> >>
> >> _______________________________________________
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> >>
> >
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> >
>
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