i would put it under 18/6 light as close to ya light as ya can but dont worry too much m8 about the look of it it looks like it is putting all its energy on to root making and once done this should start having grow sperts
cheers hope this helps
also only give it water for the first couple of weeks no nutes or ferts
wait till ya see the second lot of good looking leafs befour ya start nutrients
as ya could kill it off !!!!!
cheers bud good luck with ya grow