Is this it? "Until now, solar power has been a daytime-only energy source, because storing extra solar energy for later use is prohibitively expensive and grossly inefficient. Daniel G. Nocera, the Henry Dreyfus Professor of Energy at MIT, has developed a simple method to split water molecules and produce oxygen gas, a discovery that paves the way for large-scale use of solar power." "The new catalyst works at room temperature, in neutral pH water, and it's easy to set up."

Use a pulsating orb to "make electricity [usage] visible" and get people thinking about their energy use. Good idea!