Will uncooked meat go bad if it is left out?

I'm not sure except that as a 16 year old I experienced 120 large fish rot while smoking in a smoke house. The fish had been exposed to moonlight in a net that we set off shore. We processed the fish as we normally would - all went rotten. My grandfather had always told my Dad to keep all flounder covered in the sugar sack (out of the moonlight). My father called the New Zealand Ministry of Ag and Fish and they confirmed that moonlight can turn meat/fish rancid 3-4 times faster than sunlight. Must be the type of light waves reflected from the sun?