Long Answer : While this time of Year in Northern Hemisphere it's easy to imagine scenarios where daytime lights would be an advantage, mist,rain ,haze , fog and overcast etc. ( conditions I choose to call Low Contrast ambient light ).
Living in So. Calif. I Also run daytime lights during Bright Sunny Cloudless ,aka picture perfect conditions,( what I choose to call Extreme Contrast ambient light ).
It is fact that as we age the eye takes longer and longer to respond to changes in perceived light levels as well as being less able to detect changes in ambient light levels. During bright daylight, independent of time of year, many if not most drivers put on sunglasses to manage glare. This can be a problem in the intermittant deep shade of inner urban streets and/or suburbia.