How to tighten bud

You need better lights. The blurple lights dont build dense buds. Quantum boards with Samsung lm301 diodes build fat dense buds. I run straight 3000k with 660nm reds run on meanwell drivers. I personally think they are better than the "full spectrum" that are usually a mixture of 3000k and 5000k chips

I know if your temps in the grow area are to high it can cause that but usually only if it gets above 85F.

@Bumpy lots of variables come into play here when it comes to bud density 1. genetics - 2. light intensity and the spectrum of the lights 3. environment have a read mate https://www.growweedeasy.com/dense-buds