Worried a little about my young ladies

[JD]

First grow, ILGM Blackberry Kush fem seeds

I have a 4’×4’×80" tent with 600 watt MH 18/6 on timer, I have carbon filter with an in line exhaust fan and an in line exhaust fan for cooling the hortilux light. They are just now two weeks, started watering when soil was dry 2 inches down. Now starting to see roots through the 3 gal fabric pots, using happy frog soil as the medium. Also the light is about 2 1/2’ - 3’ from the ladies, I used the hand test. I’m trying to keep the temp between 68°F-75°F and the RH between 55%-60%, which is hard…