Lighting, environment and air circulation are very important. I'm on my 2nd grow and use a FS2000 light in a 4x2x6 tent with temp 79-80°F and humidity of 60-65% I keep my light on 20/4 schedule at 80% power and 30 in height. Patience is so important it takes time for plants to respond to any changes. I suggest when you re-pot use some xtreme
mykos on the roots to help nutrients uptake and soil health. Here's my setup and vegging gal. She's entering week 4 She's a cross of Alien OG and Purple Punch Sativa