I also used to use 24/0 for veg,now i am not vegging at all,some people think that weed needs a certain period of darkness even in the veg stage but this is more of a point of view than a fact i think.
I think it would probably seem the more natural thing to do but when you need to maximize growth in a cupboard space its more of time to effort ratio to maximum the amount of weed you get in the amount of time that you have.
Anyway i used 24/0 in veg for years and always seemed ok to me
