Almost always use the light on the NX3 during the wedding dance party but last night the bride asked me to turn it off for the dance floor. Its been so long I am a bit rusty on settings. Viewfinder looked good but footage today really grainy. My high gain was set to 18db. Its only the 3rd time in 11 years that I have been asked by the client to kill the light, but if there is a 4th, can I ask for some recommendations on settings?