Hey Grizzly: your choice to provide supplemental lighting is a personal choice. Don't let the "don't do it" folks intimidate you from what you perceive as a method you want to try. I live at 44.5 parallel, and if I relied only on natural lighting, my flock would be free loading a good part of the year. It's unreasonable to compare the chicken of today with the chicken of 100 years ago in terms of production. You raise a valid point in terms of the "provide light in the AM" suggestion, and I have chosen my own method instead of following the lemmings. Here's a copy of a recent post to an other person:
I provide lights here. But, I do my lighting a bit differently from all of the "they said" advice. "They say" to give them their light in the morning, so that they have a normal dusk. "They say" that if you give them supplemental lighting at the end of the day, that your birds will be caught off guard when lights suddenly go out after dark. "They say" to give your birds 14 hours of total light. IF, I followed all of the "they say" advice, my coop light would come on at 2:30 AM. My rooster would start crowing at 2:30 AM. My birds would start laying their first eggs of the day shortly after 2:30 AM. My eggs would all be frozen by the time I got up, had a bite to eat, and went out to the coop to feed and water and gather those first eggs. No thank you.
I let my birds have a natural slow down in the fall. When egg count gets down to the point where I fear running out, and when my customers start begging for more eggs, I start ramping up the light. (Usually starting in late October.) I add 1/2 - 1 hour/week. By the time they are at a 14 hour day, the schedule looks like this: Light on 6:30 - 10:00 AM, and 3:00 - 8:30 PM. I have a solar light near the bulb. When the LED goes off, the solar light clicks on and gives them a "night light" for a bit. But, honestly, they really don't need the night light. They are always up on the perch before the light goes out at 8:30 PM. They seem to become very well tuned into the light cycle and respond accordingly.
Additionally, current research points to providing light that leans toward the red spectrum. (warm light)