When trying to decide between high reps vs. low reps, you need to consider your goals. Heavy, low reps increase power, while high reps increase endurance.
Effective Rep Range for Weightlifting
Is there a difference for light weight vs heavy weight for bicep curls? : r/GYM
How many calories does lifting heavy weights burn compared to lifting light weights? - Quora
Heavy Weights VS. Light Weights for Big Biceps (WHICH IS BEST?)
Rep Range For Hypertrophy
Ask a Trainer: When to Use Light Weights vs Heavy Weights
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LIGHT WEIGHTS VS HEAVY WEIGHTS for Muscle Growth (science-based)
If I work out with super low weight 5-10 pounds and do around 50 to 100 reps to failure each time, will I make any gains? Can there be benefits to this