The development we are talking of is the nano-diffuser, which can be used as a replacement for standard optical parts such as prismatic diffusers, louvres, and reflectors. Our nano-diffuser is a thin PMMA plate applied with opto-mechanical nano-structures that control light distribution by modifying the surface or volume of the material. The optical relief is invisible as the dimensions of the structures are in nanometres (microns). The bitmap design consists of million of pixels that represent structures (Fresnel lenses) that can focus, collimate, partially collimate, and diverge incoming light beams in the same way as conventional lenses, but, thanks to the size, allow for more precise control of the light and so greater optical efficiency. By placing the nano-diffuser at different distances from the LEDs, the LIDC can be modified.