I have two 20 watt grow lights in my basement shining on some potted herbs and some sprouts, in soil, not hydroponic or anything like that.
I grew the sprouts from seed and they seem to be thriving. But I also have a Greek basil plant and some chives, which I transplanted from my outdoor garden, and they don't seem to be growing at all.
I've seen videos of people growing massive amounts of basil under grow lights and I'm a bit puzzled why I'm not seeing the same thing.