The Hourglass Lantern works like traditional hourglasses but turns the thousand year old tech upside down (literally) by using LEDs instead of sand. You can even adjust how long it takes for the light to flow from top to bottom by twisting the two halves like a dial. As time passes, luminance decreases on top as it increases on bottom.

I like the idea but there’s something more accurate about the sand based version since I can precisely see how much sand is left where as with the Hourglass Lantern, there’s no gauge when both top/bottom are lit.

Designer: Young Bok Kim