Very difficult
This is a kit that you have to build. First you have to purchase a little tubing bender, then a 15 watt soldering iron, low temp solder, some type of head magnifier, you will also need very tiny drill bits and I mean tiny, and a pin vise to hold the bits. You will spend an additional $50- $75 to build these lights.
First you have to bend the tubing for the gooseneck shape (this is the easy part), then you have to cut to desired length, flare the gooseneck end. Now you have to try to fish the two wires thru the bent tubing, its like trying to work with human hair, (very frustrating). Once you get the wires thru, now comes the really hard part, you better have a steady hand for this step.
Now you have to solder the wires on to the micro sized LEDs, no room for error trust me, then you have to solder the wires on the resister. If you get lucky, the light will work using you 9 volt tester, If not you end up resoldering until you get it right.
I would not recommend this kit unless you are good at really small electronics.
