The light from the LED's of Flos Kelvin LED gives off a pleasing warm light unlike past LED designs. Kelvin LED has a double arm allowing you to adjust the light to where you need it, as well as an adjustable head. The On/Off switch is on the head of the lamp and then you simply brush the head to choose which mode you would like: Personal (the switch turns orange) or Green (the switch turns green). In the 'personal' mode, you can control the level of light you require, however in the 'green' mode, a sensor is activated which detects the ambient light level and adjusts the intensity of the LED accordingly. Brushing the head of the light again deactivates this function. Available in 4 different colours.