It looks like you have an LED that has the veg and flower switches on it. If so turn off the flower light.
The Red spectrum of light causes the plant to stay squat and bush out.
The Blue spectrum will cause more stretch and upward growth with proper light spacing. . .
I have a super hot that has only gotten three inches tall but has seven or eight leaves already. I like to bush the plants out inside because mine will stretch when they reach their final containers outside. I had great success last year and this year should be even better!
Good growing.