K J
Active Member
I asked in another forum but this one seems to get more traffic. I have a 400 watt digital ballast and the bulbs it came with ring a little bit. I can't find much about grow lights ringing on google. It's not loud or anything I have to be right next to it to hear it so initially I'm not that concerned but I'm told that this is really dangerous. These are the bulbs.
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View attachment 2980086