I know this is a bit dated, but you weren't thinking of just screwing a HPS bulb into a normal lamp, were you?
If so, not it won't work. (if you tried it, I'm curious as to what happened)
HPS and MH need a ballast to work. Not unlike a floro.
You also want the bulb horizontal then vertical.
well i found a 200 watt hps light that doesnt have that huge end on it and was thinking i could us that ? maybe just get a lamp holder cord and hang above them just by the cord?