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RE: re Re: Headlight Hype? or Facts

The problem is that your eye has a gain control called the iris.


-----Original Message-----
From: owner-quattro@coimbra.ans.net
[mailto:owner-quattro@coimbra.ans.net]On Behalf Of Robert Houk -
WorkGroup Server Firmware
Sent: Friday, March 12, 1999 3:27 PM
To: kirby.a.smith@lmco.com
Cc: quattro@coimbra.ans.net
Subject: Re: re Re: Headlight Hype? or Facts

   The diff between a 80/100 and 55/60 bulb is only just discernable.  I
--- and ---

   Huw is right.  The eye is logarithmic in response.  Further, there are

Isnt' the eye progressively more sensitive at low light levels than at
high light levels? I.e., at low-light-levels ("night"), doubling the
light energy is substantially more perceivable than at high-light-levels