Sounds like you got your hands on a pure Sativa, ma man. :dance: I've heard of them getting 9' tall (3meters) when grown outside. They tend to be very leggy and have widely spaced nodes. It could be an original Haze, or something like that.

If you get to where you can't raise the light any more and it looks like it's going to grow into it then you can LST it, and that'll probably help. As for it not being strong enough to hold it's own weight, you can use cane poles. Like they do with tomatoes to keep them from falling over. If you're worried about the top tipping over because it gets over ballanced due to the height then you can wedge stuff against it to keep that from happening.

Just a few ideas, babe.:thumbsup:

Oh, one more thing. If it is a pure Sativa then you're looking at around 10 weeks of flowering time rather than 8.