Last week I went to a concert at the North Park Observatory here in San Diego. It didn’t occur to me then but looking back now, I can make a connection between that concert and Prof. Blum’s lecture on light. Times have changed immensely from using light for basic needs like illuminating the dark and have advanced to now where it can be used for entertainment as well. At the concert I went to, the auditorium was dark but it was illuminated by various colored lights. Of course this added to the mood and overall feel of the concert but the main purpose was to showcase the performer while entertaining the crowd through the use of color. Its interesting to think that we now can use light for just about anything and it can affect our overall mood, the ambience of a particular place, and allow us to do much more despite the time it may be.