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silentJET85 The LG 24GQ50F does not use PWM (Pulse Width Modulation) to regulate backlight brightness at any level. Instead, DC (Direct Current) is used to moderate brightness. The backlight is therefore considered ‘flicker-free’, which will come as welcome news to those sensitive to flickering or worried about side-effects from PWM usage. The exception to this is with ‘1ms Motion Blur Reduction’ active, a strobe backlight setting which causes the backlight to flicker in sync with the refresh rate of the display. Read the overview on the monitor. (1) You can disable "flickering". Select [Menu] → [Game Control] → [1ms Motion Blur Reduction] and press [OFF]. (2) Due to "Response time," the eyes can also get tired. Better to turn it off. (3) Then turn on Freesync Premium. What is strobe backlight? Read from here.