The Rock light was an experiment into LED's and cable-free connections.
Using LED's is gaining momentum in the lighting industry, but there is still a long way to go. Many lighting designs only use LED's as a retrofit to the older standard bulbs.
With my wall mounted concept light I used a 5W COB LED and indirectly dispersed the light with a sandblasted piece of acrylic.
The highlight for me with this project was getting the electricity to conduct through the sliding adjustable arms. Allowing for cable-free powering.