A light trapping photovoltaic cell comprising a plurality of cells connected with walls wherein the cells have a plurality of generally straight vertical walls and a bottom region adjacent the generally vertical walls. A method of producing a high-strength, austenitic, stainless steel characterised by air-melting a feedstock of super austenitic stainless steel, introducing nitrogen at 1520 C. Drivers having different buffer requirements and capabilities may be queried and matched for easy data transition between the chained drivers requiring the least number of buffers and, hence the least expensive yet most efficient inter-buffer data transfer.