Here's the update on the indoor seedling under the grow light:
I've started: tomatoes (so many varieties), peppers (hot & sweet), herbs (basil, cilantro, rosemary, oregano, thyme), shallots, kale, broccoli, tomatillos, and ground cherries. So far so good! They loved the transfer from the seed starting soil to the garden mix.
Pro tip: Solo cups with a hole poked in the bottom work great as a seedling container.