i have shot (35mm, 120 + 4x5) e6 without a meter for 10 years always exposed correctly.
one just has to learn how to observe, and know how to use the film in the camera ..
i had a mentor i trained with who stuck her hand out, cast a shadow on it, and knew immediately
the correct exposure for any film she used ( color, chrome and b/w ).
i am not as good as she was, but i am getting there ...
judging from your want to not use a meter, just look at the light
look at the shade use a meter and SEE what it says ... 1 stop? 1/2 stop ?
highlights 1/2 stop ?
it really isn't too hard to figure out, its about noticing the conditions.