New grower needs help.

[pipefitter]

If you try to tie them down make sure you water first. It makes the plants more pliable. With that being said do not tie dow any stems other than the main one as this will make your current problem a bigger problem. If you dont want to tie I recommend you use phone book to compensate for height and go for the 12/12. Assumung there is a ceiling you are already getting close to. Also, I've never been s topper so you have to ask one of the other folks.

[VEGASKUSH]

When your plants go into flowering they will double in size if not tripple. So this means you need to give your plants enough space up top so they wont outgrow there living space. When your plant has filled half your growing area it would be a good idea to switch on the 12/12. IMO when your biggest plant gets to w/e half ur hight is switch it to 12/12. If your topping them though its a different story. P.S. get some more soil in those pots they look low!!

Yes, very very low on the soil their. Might I also at topping your plants is very usefull when limited space.