Here at EarthTechling, we’ve seen our share of fair share of energy efficient lighting options. We’ve extolled the virtues of solar LED lights and the impact they can have on developing countries. We’ve featured massive public solar art displays and even highlighted some pretty cute and clever retro lighting designs. Here’s another cool one we think.

UK designer Toby Fox recently featured his energy efficient lighting project on Coroflot. Unlike typical LED bulbs that we’ve seen, Fox’s interactive product includes something he calls Light Pebbles. The light looks a little like a pea-pod and the four Light Pebbles sit in a strip of neoprene called the base unit. The base unit can be plugged in to a standard electric wall charge unit and then the Pebbles retain their glow and can slid out of the base to be used separately or as a unit.

image via Toby Fox

Exactly how long the glow lasts or the exact mechanics of it, well, we’re not quite sure, but since this is a concept, you can use your imagination to consider its possibilities.

Mostly, we just loved the idea and the look of the light itself. Perhaps the best part of the design is the individual Pebbles that can be used for a myriad of night-time activities like reading or camping. We also like how the pebbles can be manipulated within the base unit, facing outwards or inwards and giving different lighting effects.