Small space gardening

Seeds are better than buying a head of pak choi to regrow a head of it. I’m thinking I can grow a lot of lettuce and salad greens under 2 regular dual bulb 30w tube shop lights covering a 2x4’ area, 120w total. Producing fruit and potatoes and shit would take a lot more light and wouldn’t be worth it. But when you consider the cost of baby spring mix which goes for about $10 a lb in the stores the salad is worth it.