I do not use backlight for screens of the Palm III/Pilot devices. It is
useful only on absolute dark (and even then it does not make the screen
easy to read).
The Tungsten W with its color screen has backlight which makes screen
readable in bad light conditions and in darkness, too. But in good
light conditions (on direct sunlight or under a good lamp) it is
usually better to turn the backlight OFF. So for most of time I use it
in the same way as I use the older III models...
