In my experience the "whiter" light seems to offer better contrast, especially when illuminating signs at night. The older I get (dammit) the more I notice how much easier it is for me to read in really good light. Small type that I can barely make out in low light looks completely clear and crisp in really good light. Whiter light seems to offer a noticeable advantage.


For the record, I've been wearing corrective lenses since I was in the third grade, moving from glasses to contacts at age 20, back to glasses about 90% of the time (contacts the other 10%) around age 40 and finally had Lasik at age 47. Now I just wear reading glasses as needed - I can read a magazine without reading glasses if I'm outside in bright sunlight, for example.