I decided to make this a low voltage DC project...
Step 1: You will need
Clear light bulb
quartz crystal that will fit inside of the light bulb
Plastic light socket (home depot sells this for $1.40)
Wall Wart, 5VDC
Regular household copper wire ( about 10 inches)
3 LEDs ( I chose amber DIgiKey part number 160-1653-ND)
150 Ohm 1/4 watt resistor
1 1K Ohm Pot ( this was an old spare with a click off switch on the low side, sorry no part number)
3/8 inch flat rubber washer
Step 2: Prep the Bulb
I used a bench vise to break the purple glass insulator on the bottom of the screw base.
I followed this with a small screwdriver to break the clear class tube under the insulator the a pair of needle nose pliers to remove any remaining glass.
Be careful and wear safety glasses and gloves when doing this.
Step 3: Prep the crystal holder
Using the small crystal as a guide, tightly wrap the bare wire several times around one end, make sure you leave several inches of wire to attach to the base.
Step 4: Make the led light assembly
Bend the long leads(anode) outwards at a 45 degree angle and twist the short leads(cathode) together tightly.
Press the led assembly into the base and bend the long leads so that they touch the copper wire holder. Solder the 3 leads into place onto the holder.
Solder another wire to the cathode wrap.
place the assembly in a vise and fill with clear silicone.
Press the crystal into the silicone and wait for 24 hours.
Step 5: Make the light
Insert the LED assembly into the bulb to get an idea of where you would like it placed, mark the anode (holder) wires and create a flattened part on the wire. I used a bench vise for this.
Bend the wires at the flat spot and place the assembly back into the bulb. Solder the wires to the screw base on the bulb, you may want to use a high powered solder gun for this so that you do not end up with a cold solder joint
Notch the edges of the rubber washer with side cutters and fit over the cathode wire and into the bulb screw base, Place a large ball of solder on the cathode wire at the rubber washer interface.
Test fit the bulb in the base and trim any extra solder as needed
Step 6: Power the base.
With the pot in place solder one lead to the 150 Ohm resistor and connect it to the socket screw which goes to the center of the socket for the cathode wire.
Solder the negative lead of the power supply (shown black) to the center lead of the pot.
Attach the positive (shown red) to the socket screw which connects to the bulb screw base mating surface.
Not shown but attach a knob to the potentiometer adjustment shaft.