User profile: Shyam VerifiedYes Geez, The "omelette" is a French innovation, so I choose to pay homage to its ancestral origins, through my spelling. However, if the Anglo-cized knock-off spelling is good for you....well...why the hell not? It takes all types! :) By the way, I think you meant to write "homily"....not "homely". (Is this going to be a continuing problem??) Geez...what is that on your face, dude? Egg, maybe?? What did I tell you about sloppiness?? :)) No difference in physics, my friend. You're just partially incorrect. :) Ultraviolet light (which is 10-400nm on the overall spectrum) is invisibly present in both natural (sun) and certain artificial varieties of light. This includes halogen lighting. In fact, most halogen light fixtures have both a anti-UV coating on the lamp and a glass UV filter covering the lamp. Unfilitered, halogen lamps are one of the most intense sources of UV light. UV light has a shorter wavelength. You may find this Wiki page of interest: