Ukrainian architecture and design studio Nottdesign created the RA table lamp that encourages you to interact with it in order to turn it on and off. When the tube rests horizontally, it’s off and when you’re ready to turn it on, simply raise the tube into a vertical position. Their desire was to design a lamp that required the body to move, not just your hand and wrist.
As the lever rotates clockwise, the light slowly turns on until it’s at 100%, or you can stop it at any point for desired brightness. The movement was intended to reference the path of the sun as it moves through the sky, i.e., the higher it is, the brighter it is.
from WordPress https://connorrenwickblog.wordpress.com/2017/08/25/a-table-lamp-by-nottdesign-that-you-interact-with-to-turn-it-on/