A few days ago, the occupier on the fourth floor of the facing building and the one in which I live, changed the living room light bulb. In the evening, when switching on the light, the window lights up a striking white and cold color which clashes with neighboring rooms. The old incandescent bulb was replaced with a new energy-saving light bulb, hence, its fluorescence. This is owing to the fact that the European Union has decided to progressively ban the manufacture of incandescent bulbs, which began in 2008. Developed over the late