For those that were curious about the XL2420TE in non-Lightboost mode, I can confirm it's lowest brightness setting with zero-PWM is in fact lower than the two other monitors I have here. I have decided to keep one of the XL2420TE's for it's zero-PWM feature and use as a side monitor to my 3x1 Portrait XL2720T surround setup. If you want a non-Lightboost 120-144 Hz monitor that has a wide brightness adjustment and zero-PWM flicker, the Xl2420TE is the one to get (well, the only). I personally love Lightboost strobing and zero-PWM on m y eyes versus regular PWM strobing. I would normally have stuck with my Dell U2413 but I found a nasty bug in which if you have a surround setup at 120 Hz, and a 60 Hz monitor on the side it doesn't work properly and the "feel" of the 120 Hz setup drops down to the 60 Hz. So, if you have a 120 Hz surround setup and want to run that 4th screen, you must match it with a 120 Hz screen.