Ever since we grew lettuces in the kitchen with a bog-standard 'grow-light' tube, I've hankered after a better system.
Mad? Yes! But I just love to try things. So I got one. For a start, I'm just extending the day, to keep seedlings short jointed. This year seems to have been a pain for leggy seedlings.
It's still not the REAL thing - but then, I'm not doing it for money, am I? = Tim
(Essentially 2 units, which can go end to end, giving a lesser light to 1m x 1/2m.)