I had two cheap LED-lensers lying around on one side and the bikes old lights, dynamo and a toolbag on the other side. I had no more use for the dynamo, so I sold it on ebay and the toolbag was to beat down (torn straps) so I put it aside.
The lensers were taken apart to get the LED's, the leftovers tossed.
Not pictured: two-wire cable, switch
As tools I used mostly standard equipment. Nothing special here apart from a soldering station and terminal cables: pliers, screwdrivers, side cutters, pen and paper, knife, ...