I tried something when CFL lighting became cheap/subsidised. It involved making football/rugby ball shaped structures out of chicken wire and trying to scrog around them. Went terribly but future hps grows went better Started with normal scrog (pulling about 16oz off 4 plants in a 250MH veg, 600HPS flower consistantley despite temp problems). Then I had to downsize so did a U-scrog, pulled about-5 oz off a plant under a 250 in a very limited head-space. Finally, I did a normal vertical scrog in the same pace and pulled around six oz. I haven't grown weed for a few years but when i grow again, it will be a vertical scrog, probably starting 250 hps, working up to 400, then a cooltube to finish.
A few points with vertical scrog.
At stretch, you will be pulling branches back behind the screen almost daily.
You get more buds but smaller. More trimming etc. Less sticks in your weed though.
Personally, I've found that even if the bulb is dropped right down below the middle of the scrog, the buds still head upwards.