Brilliance occurs either through the reflection of the light source or the refraction of light. It enhances the appearance of shiny surfaces. If the luminance is very high, glare results. In print media such as this book, the actual luminance contrast cannot be reproduced. The small series of images on the opposite page illustrates how brilliance increases as the light source becomes more and more compact. The detailed views show the shape and intensity of the highlights on the surfaces.