You turn the lamp on with a strangely low-tech button embedded in the fabric-covered power cord. Tap it up to three times to intensify the brightness, and turn it off with the fourth touch.  Roger Yang’s Saves from Whimsical Floating Lamps

Roger Yang’s Saves

You turn the lamp on with a strangely low-tech button embedded in the fabric-covered power cord. Tap it up to three times to intensify the brightness, and turn it off with the fourth touch.