ScreenBar Pro

The BenQ ScreenBar Pro lights a 33.5 x 19.7-inch (85 x 50 cm) area of desk from a bar that sits on top of the monitor, and none of that light lands on the screen. Centre illuminance is above 1000 lux at a height of 50 cm.

An ordinary desk lamp sits to one side, so the pool of light is bright under the bulb and fades towards the edges. The ScreenBar Pro is a bar mounted above the display, and BenQ's lab tests give a uniformity ratio of less than 3 across the whole lit area. The brightness is calibrated to 500 lx, the international eye-care standard, so the desk is lit to that level without the screen catching a reflection. The LED driving technology allows a low minimum brightness and flicker-free illumination, which matters when the light is turned right down for late work.

The light source is a dual colour LED with a colour rendering index of Ra≥95 and a colour fidelity index of Rf≥96, so paper, skin and printed colours look close to how they do in daylight.

The patented clamp is made for ultra-thin, curved and ultra-wide monitors, and it is designed not to scratch them. Power comes over USB Type-C at 5V and up to 1.7A, a maximum of 8.5W, through a 180 cm cable.