1 Light cycle desk light, 1 Adaptor 5 year warranty Powerful light (100-1000 lux, 2700-6500K), with glare protection, low optical flicker (<1 percent), CRI-90 Heat Pipe technology keeps six high-power LEDs cool enough to protect light quality for 60 years Ambient motion sensor switches light on when you're near, and off when you're away for 2 minutes Ambient light sensor reacts to changes in background light, keeping your space at a constant brightness Adjusts its light for your age, task and sleep times, controlled by the Dyson Link app