The reason the lights shimmers and changes in iridescence is...

The reason the lights shimmers and changes in iridescence is that tiny holes that are exactly the wavelength of light being reflected, ... right now the size of chips is as small as it can be using lenses. The trouble is, as you go to higher wavelengths, the glass absorbs the light. The solution is to use mirrors, which will reflect most wavelengths until you get up into x-rays.