Hey bro. No offence intended but you are not using enough lumens. What kind of lights do you have? Your cream caramel at week 5 looks like mine on week 2 and I'm barely using 100 watts CFL/LED.
@Perth, I'm using five stripes of led and one cfl but the first week I was keeping the lights at approx one meter from the plant, so I think thay's why it grew slowly at first 😕