Google - how much energy is emitted in 1 second by an 8 watt red laser with wavelength 500nm?

Your question makes no sense. "Google" is a company and a website, not a magic word that you invoke when asking a question in some other venue. Energy is not a physical unit. It is a philosophical concept and an accounting technique used to analyze mechanical and chemical exchanges. In nuclear physics it is defined as a wavelength of light, in biology it is a synonym for metabolism, and in public utilities they say energy when they mean connectivity. Anybody who uses the word in any other context either does not know what he is talking about, or is peddling something you don't need.