Note: This model is currently quick work and untested. Will updated once it has been tested.Setup:Insert 20 LEDs from lampshade side, bending each of the legs outwards to hold into the holesLeave enough gap to allow LEDs to be bent and re-pointed compensate for narrow beams.Soldering depends on your power source...3 volts: Each of the 4 rows should have 5 LEDs in parallel. connect the 4 rows in parallel. Make sure to bend the LED legs the right way to make your life easier by aligning all.12 Volts: 5 parallel rows of 4 LEDs in seriesMy Current plan is to implement a pulse-width-modulation circuit using a micro-controller, using a voltage-control feedback, basically implementing switching.However, two 1.5v Alkaline batteries may accomplish the task as well, but will get dimmer with time (voltage falls off as battery is depleted.)