Might be ok.. that looks like its mostly indica.. but really you wont know till they stop stretching and that will be at least 30-40 days into flower.
Couple things to consider, how much light penetration.. and how high you can raise your lights, you could train them so they dont get too high. It might not just be an issue of height but if your lights can properly light a tall plant. Otherwise you will be dealing with alot popcorn, an aggresive lower prune can solve this.
Or a more radical approach is to use a PGR, but this is up to you as a grower..