As far as I know Multi vapour simply mean Metal hallide just a different name for it. I simply googled this mullti vapour thing when I saw you unanswered thread for you as a favour for something to do coz I was really stoned
, I have no idea about it really, at a guess it prob just takes MH bulbs, it would have a switch on it if it was suitable for hps and MH.
MH is suitable for the veg stage of growth. High in the kelvins prob 10,000 plus or something, where as hps is maybe 2500k.
I just finished my first grow and have never known about grow llights until a few months ago so I'm not too much help.. hopefully more experienced growers can help.
Have a good look on google, it only took me a minute to find what I did, if you spend more time you may have more luck mate
If you really want more answers post another thread worded differently... maybe something like "are multi vapour lights better than MH" lol, some smart arse will soon start telling you they are the same thing, then ask him more questions because he will be happy to help because of his ego from proving you wrong lol
Good luck