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Date:         Wed, 6 Feb 2008 08:17:59 -0500
Reply-To:     Mike S <mikes@FLATSURFACE.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mike S <mikes@FLATSURFACE.COM>
Subject:      Re: LED taillights WAS: Re: repost optional bulb sizes/wattages?
Comments: To: Jaap Nauta <bus.mail@IAE.NL>
In-Reply-To:  <10343.194.105.120.80.1202294530.squirrel@webmail.iae.nl>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 05:42 AM 2/6/2008, Jaap Nauta wrote...
>Has anyone tried these:
>http://www.superbrightleds.com/specs/115x-xLX3.htm ?
>
>These are wide angle high power LEDs, which in theory are brighter
>than
>incandescents


Not even close.


The 1157 LED replacement is rated at 30/85 lumens flux. A real 1157
bulb has 3/32 mean spherical candlepower, which is 37/402 lumen. Not
only is the direct beam of the real 1157 incandescent bulb brighter,
but the reflector will add additional light.


In reverse, the LED bulb, with a 130 degree beam, is only providing
0.73/2.08 mean spherical candlepower. (1 lumen = .07958 MSCP, 130
degree cone = .32175 of a sphere)
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