Listen man, floros have a maximum effective range of 10". Period. Sativa's grow huge and they take a very long time to get there. You have to have a strain that will stay short and even then you will need to flower it at about 4" to keep it under 10" and even then you will need to train the plants by tying down the tops. I would suggest kgb x burmese, which is a mostly sativa plant which has an indica growth pattern but produces a sativa high. I"m still smoking some from my last harvest and it's about the best UP high I've ever smoked and I'm 40.