Surcharge for gesture control for all Byok Piani Mono, Quadro, Lungo and Rondo. With gesture control, the light is dimmed by holding the hand flat under the lamp. By using the Dim2Warm technology, the light gets a warmer colour when dimmed. When dimmed, the light colour of the LEDs changes from 2,700 Kelvin extra warm white to 2,100 Kelvin extra warm white. The dimming range is between 0 and 100 percent.