One reason why, imo, it would be a bad idea--to have a plant that would yield a pound it would have to be both tall and wide.
The further away from the indoor light source, the weaker the buds.
It would have to be heavily topped, meaning it'd take months and months to get big enough to yield a pound.
I could do it, but I'd need more than a 600-watter.
In the time and space it would take to grow a plant that would yield a pound, you could get more than a pound by growing lots of plants multiple times that would yield a few oz per.