This is an updated version of the ball and socket LED lamp. The part that holds the LED strip is larger to accommodate 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.
Also, the part that holds the LED strip is larger than the MP Select Mini's 120x120x120 print area, but you can tell your slicer that the x or y distance is 130 instead, and this will print just fine at 100%. Print without a raft, brim, or skirt. I do it all the time.
Here is the original design that this thing is remixed from: http://www.thingiverse.com/thing:1698383
Here is another light arm I created that has less points of articulation, but lasts longer than the ball and socket joints: