For 37 days old not looking bad at all my man. A 1000 watt HPS WOW that is a shit load of light for one plant but who am I to talk lol. Start putting the food to her bro. She needs groceries to get big. Watch defoilating you are better off to leaf tuck. She will grow into a nice plant you have the temps right and the RH. Do you have a Bud booster supplement?