I notice the baby plants going through rest periods but not all of them. If you are only starting plants to transplant outdoors for continued growing, the lighting is not that critical. I can identify with Rob as to setup and no scientific method of lighting. I do move the trays around on the shelves since some areas have more intense lighting. My room is dark with only morning sunlight so unless the plants can go directly in the window I must use grow lights.
Here is our grow light set up...
