How are my plants doing? And what am I doing wrong?

[AceOfClubs]

Here are four of my plants, note that the two smaller plants were planted 2 weeks after the larger two.
Temps keep around 26-27°C during day time.
Humidity is 60%.
Using 300 watt metal halide with plants 13-14 inches from bulb.
I am currently using a fertilized soil but next transplant I will be using non fertilized media.

Any help would be appreciated thanks

 

[Cannamusic]

They look good bro.
You might start thinking about putting them into larger pots soon.
Those roots need room to roam.

 

[Emilya Green]

which fertilized soil are you using?

 

[AceOfClubs]

@Cannamusic thanks! They will be going outside next week in 15 gallon grow bags

 

[AceOfClubs]

@Emilya I'm using Schults potting Soil Plus but I will be switching to coco coir next week when these go outside