"Translate balloon volume into brightness" is the central technology in the Pumplight. As the pump inflates the balloon the light becomes brighter as well. To turn off the lamp simply open the escape valve, the light will gradually fade out and the balloon will return to its original size.
An IR sensor detects that the balloon's volume increases and controls the the light which becomes brighter. When the balloon reaches a certain size, the light does not become any brighter signaling the user to naturally stop pumping. Of course some people will wonder: "What happens if you keep pumping?" The answer is simple – just like a normal balloon, if you keep pumping it pops! But it's no big deal, just replace the balloon. The balloon acts like a replaceable lampshade. The LED light used as the light source plus the manual and intuitive pumping method makes the Pumplight an eco-friendly and surprising interactive light fixture.