I don’t think LEDs are the move for beginners. Fluorescents are easy to hang, cheap, and won’t burn plants unless you really try. Otherwise this is pretty decent advice.

For home growers, you can cut your seed trays as needed, because nobody needs 128 zinnias unless you’re a flower farmer. Like, cut up a tray of 50s and only use 10 if you want to, and add them in a 1020 with other tray types, depending on the plants. Your space will go further and you can grow more things on your wishlist that way, vs dedicating an entire 1020 to one type of plant.

Anyone needs help with their setups, let me know! Former flower farmer here - had something like 150 trays going in my basement at one point a few years ago, because I didn’t live on the farm.