This is a ball and socket LED lamp than can be positioned in any direction. The part that holds the LEDs accommodates strips whose sections measure 10mm x 50mm (5050). Two sections are used for this lamp so it is a strip that measures 10mm x 100mm in total.
To print this on the MP Select Mini's 120x120x120 print area, tell your slicer that the x or y distance is 125 instead, and this will print just fine at 100%. Print without a raft, brim, or skirt. I do it all the time.
The author hasn't provided the model origin yet.