I have good success in front of the patio sliding doors too. I usually add a grow light in late afternoon and into the evening to simulate summertime light.
I would have a light of some sort on anyway, so using the newer grow lights which use less electricity would be a good option.
I planted some seeds on 1/9. Big Rainbow tomatoes, ancho poblanos and garlic chives. Two paper cups of each. I had thought to do more today, but I don’t think I’m up for it. Tomorrow, I hope.