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Date:         Mon, 28 Jun 1999 19:26:48 +0200
Reply-To:     Per Lindgren <lindgre@ONLINE.NO>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Per Lindgren <lindgre@ONLINE.NO>
Subject:      Re: Halogen Back-up bulb
Content-Type: text/plain; charset=us-ascii


David Beierl wrote:


> I don't know how much heat the halogens produce
> compared to the regular, though I suspect it's similar.


The heat output from your 50 watt bulb is nothing similar to the regular 21 watt
bulb. The common knowledge is that only 5-20% of power is transmitted to the
light, so while your 21 watt bulb pulls 21 watts from the cars electricity, only
5 watts are used for light, the rest is wasted in heat. So, the 50 watt bulb you
have probably generates 10-15 watts of light, the rest is heat. No wonder the
rear lights melt!


Don't ask me how I know, I just do :-) Its something I picked up once, and it
stuck in my memory.


PerL
Bug, Bus 'n 'Back
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