We spend a lot of time at my desk, most of that time staring at a computer or laptop display. Eyestrain remains a problem when reading from a computer screen though, lighting is important, having a consistent source of light in the area as you're working on the computer is helpful. The primary purpose of our screen light bar is to improve lighting conditions. It does this in multiple ways. Because it?s designed to be positioned on top of a laptop monitor, light shines down to illuminate the space in front - the work area. It uses an ?asymmetrical optical design? that prevents that light from reflecting off the screen and avoiding reflectively glare off your laptop screen. Specifications: Light bar length: 10.2?/ 26cm Net weight: 0.17 lb. /80g Light source: 54 LEDs (27 Cool White LEDs, 27 Warm Color LEDs) Zero reflective glare off the screen Max 500 Lux in the center 10 Adjustable brightness levels 3 Color Temperature: 6500K, 4000K, 3000K Power Input: 5V USB port (Computer/Monitor, USB charger, Power bank) Materials: Aluminum alloy, Polycarbonate LED Lifetime: more than 100000hTips: Its specially designed for laptop screen, it may not suitable with your desktop computer monitor.