Hello all. Sorry if this has been answered previously. I am a first time grower, using metal halide currently w/ 400 watt ballast transformer. I am using a small storage area with a door at my house, and although i have made the grow area "light tight" using drywall, you can still hear the hum of my ballast, even from a distance. It seems it will draw attention, as it is so loud. Is there any way to muffle this sound? Current thought was to use a "dummy table" in front of my storage to kindof block it off and also to house the ballast/transformer and muffle the sound. First though was, maybe use a sound shield or styrofoam. but was worried it might be a hazard. Can you do anything to the ballast/transformer to make it less loud without causing a fire hazard or possible damage to the ballast? Thanks everyone.