Thanks Pirate, kgb & burmese noted. I know I wouldn't have much joy with a pure sativa, but as almost everything's a hybrid these days I was hoping one of the seed farms might have made a short one already. I was thinking of experimenting with a vertical cage, 1/3 open, and just let it hit the ceiling, 'bout 8ft. Only minimal yield required, it's just for me and the fluoros cost f**k all to run.