seemed they just do not fit. an instruction manual did not exist. a mounting frame was rejected, on the grounds I have everything for mounting a lamp needs. such a service, I have in my life never experienced.
This should also order, if you order an LED panel. Sorry, no drawing is, so a bit difficult in the attachment and alignment with the LED panel. Otherwise, just given handling.
I bought a 120 x 30 panel and am been "advised" to these mounting rails. I had assumed that would fit well with the 120 panel. UNFORTUNATELY, NO. For the panel namely you need any additional mounting rails. Unfortunately, the note lacked the Pan
Required mounts for LED panel, clever would be if these brackets are shipped directly to the product LED panel, otherwise you stands and the lamp can not be mounted.