Usually what you do to solve that problem is chain a bunch of LEDs together in series and then those groups together in parallel. If your process technology is

Usually what you do to solve that problem is chain a bunch of LEDs together in series and then those groups together in parallel. If your process technology is +- 5% then chaining 5 LEDs in a row will even out your average error to +-1% instead. Which makes a big difference. Of course, if they don't do that then you're right that there can be problems.