Monitor light bars offer the advantage of controlling the color temperature/hue of the light. Typically, hues ranging from 3000K to 6500K are ideal. The lower the number, the cooler (read whiter) the hues. And, the higher the number, the warmer (read more yellow) the hue. A word of advice, select a device that offers stepless hue control to choose the perfect hue for your work desk.