Plant looks basically healthy.. that being said it is stretched big time.. You didn't add what lights....I'd say light is your problem... I've vegged 2 plants using 2 X 26W CFL on a Y splitter ($15.00)..and put them close approx 3/4 - 1".. check heat on back of hand.. not much can be done about stretch now, but as I said it looks OK. health wise... no burn, wilting, twisted leaves..etc... Luck.