The shop lights work just fine for starting seeds. Some plants like a little more light than others. Like peppers and tomatoes I usually make sure and put them under my stronger lights. For things like cabbage and broccoli I don’t worry about it as much. I’m probably going to end up doing a rotation this year because I’m running out of space and don’t want to buy more lights!
Those are the standard wire racks you can get at Menards or Lowes. I think they’re 4’ by about 20". They fit 4 of the 1020 trays about perfectly which is why I really like them. If you watch Lowes has sales on them a few times a year. They’re around $50 on sale.
The light bulbs are rated at 1600 lumen each so that’s 16,000 lumen per shelf. I know you’re not supposed to measure light for plants with lumens, but it makes it easy to compare the standard lights IMO.
This is my third year starting plants with LED and they’ve always been healthy. I have some that are 3000k and some that are more around 6000k. They both grow fine. Peppers seem to like to put on bloom early with the 3000k. I’m not trying to grow year round, once they go outside they all need to get adjusted to the sun anyway and take off.
I’ve also made my own with the strips I listed above. Those are good too. They put off a lot of heat and will sunburn the plants if they too close. I’ve been running them half power this year and it’s going fine so far.
The containers are just plastic 1020 trays. The pots are ones that @Barkslip recommended. I’m loving them so far! If you need a tray for the whole shelf these fit perfectly. They’re out of stock now though. Poly Large Garden Tray, Black - Greenhouse Megastore The Giant Plus ones do not fit the wire shelves though.