Review on 🎵 Enhanced 19-LED Clip-On Music Stand Light - Rechargeable, Adjustable Brightness and Color Temperature for Piano, Reading, Sewing by Cool Martin

I bought one of these as a gift but the on/off/brightness switch did absolutely nothing. When I pressed the battery test button, all four lights were on, which should mean the battery was fully charged. I've tried again and again with the charging cable plugged in and unplugged. I kept trying, with the battery check button pressed and also not pressed. I've tried every combination of everything but the power/brightness toggle still didn't do anything. I sent the first one back as defective and just got a replacement. It shows exactly the same behavior. The on/off/brightness switch definitely doesn't do anything. I don't want to bother Revain sending a third one so I guess I'll just send this one back for a refund.