grinding

  1. P

    My 300w 140 true watt LED grow light is making a grinding sound - What should I do?

    my 3 month old galaxyhydro 300w 140 true watt led grow light is making a grinding noise. the grinding noise. it is very noticeable for the first 20 minutes after the light turns on then the noise fades away and then you can barely notice it . should I be concerned ? and is my led light any less...