@Ljk2000 I have grown tomatoes only a few times, always on north facing windows because of lack of alternatives, and the seedlings were leaning towards the light (and also a little etiolated), that's why I like yours: they go straight up. In fact lack of space and lack of proper growing conditions made me to experiment with methods which people frown upon: no drainage pots for seedlings, watering as little as possible in order to balance the lack of light, etc.