oh man that blows.. i just bought 400W HPS from HTG.. got it in today its been running for about 6 hours and I havent noticed any sounds yet.. imma go check my bolts though!!
bombdiggity Reviewed by bombdiggity on . Ballast Noise! I just got the 400 watt hps from htgsupply.com (High Tech Garden Supply) I knew the ballast would make a little noise, and it did for the first few hours it was plugged in, which was fine but then at about five hours the humming started to get way to loud. Is this normal? If so, how do you deal with ballast noise? It gets too hot to just muffle it with a blanket on top. Any ideas? Rating: 5