What’s changed, basically, is how the company’s Light-Guide Solar Optic is packaged. The original design had two triangular acrylic optics packaged as a square. Each triangle captured, directed and concentrated light to a single corner where a tiny solar cell was positioned. The new design is a full square that directs light to the centre where it is concentrated in a secondary glass optic. In this secondary optic, concentrated light is bent at a 90-degree angle and hits a small cell bonded to the bottom. The effect is essentially the same, but the new design lowers the quantity of materials, reduces steps in the manufacturing process and, as a result, means lower manufacturing costs. The end result is the lowest-profile solar concentrator I’ve seen that has commercial potential.