We received a comment in a survey conducted last fall that the lighting on the main (aka first) floor was too bright.
Library Director's response:
Some of the lights were on a timer and would only go on after sunset, increasing the brightness level. This was fine when the floor was filled with shelves that blocked the light, but it was indeed way too bright for computer use. So, we are no longer activating the extra lights on the main floor in the evening.