Anyone who has done color calibraton for high end press
work will observe an unmentioned and unmeasured factor
in this discussion:
Ambient light lumins, of three types
1) in general --"Surround light"
2) in the 180 degrees in front of you
3) in the vector directly behind your screen (directly in your eyes...)
if the pupil is contracting from too much light coming in
(the case if you are crazy enough to have an open sunlit
window in your field of vision while reading a screen in that same field)
while at the time trying to focus, for many people this
condition is immediately relieved by white type (or amber)
on a black background. Speed and comprehension
may (guessing) even go up... because if the ambient light
lumins are too high, the user is closing her eyes,
looking away, getting up to go for a walk, to relieve the
eye strain, so, in the course of 2 hours, you end up with less
input...
Meanwhile someone who's environment is set to a 50%
gray (and that can just mean medium beige paint on the walls)
whose computer is facing a brown wall, and the windows are behind him
and the lights are recessed ceiling lights (all good stuff)
he will be very content to read black type on a white background
all day... "he's so concentrated!" and he can't understand why
the lady in the other office with her computer facing that giant
glass window (she loves the expansive view)
is complaining about headaches...
Simple test... assuming you don't need to see papers
around your desk for those who think white type
on a black background is "easier on the eyes" just turn off
all the lights in a room, at night, and then switch to
black type on a white background...
Sivakatirswami
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Jeff Reynolds wrote:
Stephen,
No you are not alone, just in the minority from the work we did. I wish
i kept the data, the company is now gone along with all the files... I
do remember that the score distribution was totally moved down on the
light on dark tests, so it looked like most everyone was being affected
in stead of just part of the group bombing out badly. I'm pretty sure
that Xerox, Apple and MS HI research has borne out the same conclusions.
Light on dark is great as long as folks can select what works best for
them. Only problem is users may not realize their comprehension, speed
and retention are going down using the dark on light... Even though it
may look better to you that does not mean you function better with that
one. Thats exactly why we did the tests so that we would not just do
what looked good, but what worked better.
in both print and screens i find myself squinting when i go dark on
light. I dont notice this at first and just adjust, but in a while start
realizing im squinting and leaning a bit. I know the eye doctors dont
like you doing that for any long period. my eyes are at boarder line
needing glasses after years of staring at screens.
Im all for energy reduction and do just about everything i can to do it,
but in this case i just think its a bad idea unless its totally
switchable since it can just cause problems. Just seems like there are
many other ways of saving energy and carbon that are much more active
and just have all sorts of wins w/o losses. like driving less, not only
saving energy you are reducing your exposure to injury and exposure to
high point source pollutants as well as lowering stress!
cheers,
jeff
On Aug 16, 2007, at 6:50 AM, [EMAIL PROTECTED] wrote:
Energy considerations aside, I <LIKE> a black info window with white
text. I find it a lot easier on the eyes. I'd do it with all apps
that require text entry except many apps don't fix all interface
elelments correctly to match.
I can't be alone here...
Kay-
account the huge number of page views, according to his
calculations, 750
mega watts/hour per year would be saved.
OTOH, at a 20% wattage savings, if I have to spend 12 seconds longer
each
minute squinting at light gray text on a black background then it's a
wash.
And if I have to spend any longer because of the unreadable text I
actually
waste more electricity than if I'd left well enough alone.
--
Mark Wieder
[EMAIL PROTECTED]
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