It depends on what your goals are, lower reps with heavier weights will give you more strength. Higher reps with lighter weights will give you bigger muscles.
This isn't true. Lower rep ranges will better acclimate the CNS to higher bar-weight, but that's not really the same as "strength".
On the flipside, higher rep ranges don't give you bigger muscles - overall training volume (total weight moved per movement) is moreso the determining factor on "size"[0]. In general it's best to just do whatever you find difficult. Lots of "powerbuilders" use Undulating Periodization (sometimes Daily) to try and get the benefits of the CNS acclimation + the increased work capacity that higher rep ranges bring.
On the flipside, higher rep ranges don't give you bigger muscles - overall training volume (total weight moved per movement) is moreso the determining factor on "size"[0]. In general it's best to just do whatever you find difficult. Lots of "powerbuilders" use Undulating Periodization (sometimes Daily) to try and get the benefits of the CNS acclimation + the increased work capacity that higher rep ranges bring.
[0] https://www.strongerbyscience.com/hypertrophy-range-fact-fic...
[1] https://www.strongerbyscience.com/daily-undulating-periodiza...