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Re: [Healeys] Replacement Light Bulbs

To: Alan Seigrist <healey.nut@gmail.com>
Subject: Re: [Healeys] Replacement Light Bulbs
From: Oudesluys <coudesluijs@chello.nl>
Date: Thu, 23 Sep 2010 14:47:33 +0200
  Alan,
I have to disagree with you here.
Brightness plays a role but more important is the light pattern the bulb 
gives.
A traditional bulb radiates from a point (spiral glow wire) and the 
lamps reflector and or lens are designed to transform the emitted light 
from this point into a specific beam. This necessitates that the spiral 
in the bulb is always in exactly the same position, which is guaranteed 
by the various standards like DIN / EN / BSI / SAE etc.
The problem is that the LED bulbs do not radiate from a point, but from 
a much larger area and also in the wrong position which makes it 
impossible for the lamp reflector or lens to cope with and shape it into 
the intended beam, resulting in very poor visibility. An easy check is 
to fit the rear lamps of one side of the car with LED bulbs and the 
other with the standard bulb and watch the difference in daylight!!
These LED bulbs can only be used safely in lamps designed specifically 
for them.
Kees Oudesluijs
NL

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