Stunted?

[Tamizan]

Is my poor sav stunted?

I've had him for 7 months, and when we got him (assuming he's a he lol) he was 6'', now he is 19'', i was told they should reach total length in 16 months........i feed him 2 mice everyday, with reptile vitimens (Calcium, and others, no Phospherrous(Sp?)), i have a 8.0 Uva (right? it's a long purple strip light, i ge tconfused lol), his usual basking temp (right where he bask's) is 165 F, whole tank is usualy 100-110F, i'm using 3'' of Eco earth substrate (dryed out) and always clean water. So, is he stunted, or am i doing something wrong, or what?