Designer Young Bok Kim has come out with the Hourglass Lantern which works like the tranditional hourglasses but using LEDs instead of sand. It is possible for you to adjust the duration that takes for the light to flow from the top to bottom by twisting the two halves like a dial. The design looks great but at my first glance I thought it was a doorknob. More pictures after the break.

[via Yanko Design]