I can't seem to find if this has been solved already so here goes..I started playing "Full Moon Fever" and it seems that Lights/TDM_Lanternlight is the source of a VERY loud Constant HUM. So Much so that I can't play the mission. I'm Playing around with the Console and "Editsounds" but it does not list a Lights/TDM_Lanternlight. I know its the source because if I Flip a Switch in game that turns the Lights off the sound disappears. Any help would be appreciated and keep on making GREAT missions