Probably not. You can extend their service as the plants get bigger by attaching them to coffee cans with zip ties. Add a weight at the bottom of the can to add stability, and bob's yer uncle.
You grow some big-ass plants though, so that's prolly not gonna cut it through the whole grow.
The 9"ers take up more real estate, but you need less of them. IMO, if you don't run CO2, you need to optimize your ventilation as much as possible, so it's good to have both sizes. In veg, the small ones work fine, but in bloom, you need more flow, and the plants can handle it without stressing by then.
I'm a legal grower, growing within my medical recommendation's
guidelines, so I'm not doing anything illegal.
From the general standpoint of keeping my grows on the down-low, the videos don't really reveal any more personal info than pics do, so I'm not concerned about that.
The videos are uploaded as "unlisted", so they're not public on youtube. You have to have the link to view them.