That is a brilliant looking plant for 2.5 weeks. I just hope the plant isn't as yellow as it seems. Anyway as far as it being an auto, it is next to impossible to tell until it takes off on it's own. That can be a quandary for you. I would be inclined to treat it as a normal plant, meaning 4 week veg and then change the light to 12/12. That will still work and you won't end up with a plant that never flowers if you never change the duration of your lights. Peace