infiniteloop wroteFrom what I understood, software based filters reduce blue light from light pixels but not dark ones, only a hardware based filter can reduce all pixels blue light emission
Software based filters are essentially
1D LUTs that apply over the entire spectrum of colors that are shown on your display, regardless of darkness or lightness. Hardware-based filters are equivalent, the only difference being that such an LUT is implemented in the display firmware. Actual blue light reduction ought to occur at the backlight level, by not emitting excessive blue wavelengths in the first place - however, blue light reduction technologies are in essence overrated and all you really need to maintain an acceptable blue level is a proper and accurate calibration of your display to a color temperature of 6500K or lower. A hardware colorimeter such as the Spyder5 (not very accurate for near-black) or the i1 Display Pro (much more recommended) would help.
On a further note, most BenQ displays in the 24" - 27" range that have come out the last few years are abysmal.
https://www.reddit.com/r/Monitors/comments/5klvmw/is_the_benq_xl2411_a_good_monitor_or_would_you/dbp8ji2
https://www.reddit.com/r/Monitors/comments/6jwvik/difference_between_benq_xl2411z_vs_zowie_xl2411z/djhmj98
The proliferation of BenQ high refresh rate displays in the Lebanese gaming market in the last few years is simply borne out of ignorance. Much better displays from other brands can usually be had at the same price points.
Let's not talk about overshoot due to aggressive overdrive, DyAc, and other superfluous, and often image quality ruining, features of those monitors.