There are flicker-free (no PWM at all, or at least no PWM at mid and hi brightness) models, and you can find (unfortunately that's usually not that simple becau

There are flicker-free (no PWM at all, or at least no PWM at mid and hi brightness) models, and you can find (unfortunately that's usually not that simple because vendors are mostly hesitate to specify it) a model with minimal possible brightness low enough for comfortable programming work.