Here is how I built it:
3/4" Oak stained with no less than SIX (6) coats of Minwax Ebony stain, followed by a satin polyurethane finish.
Radiometer from Edmunds Scientific ~$12.00
Ammeter newly purchased from eBay ~$8.00 incl shipping.
Slow changing color LEDs ~$6.00 for 50!!!
The transistors found in the Blinky project ~ $4.00 for 50 (if i remember correctly).
Dimmer switch $5.00
9 vdc transofrmer - free off an old cell phone charger
The internals show the support posts for the radiometer which was epoxied into a PVC electrical conduit coupling and the post for the lamp socket. I then used the post to support the circuit board and light panels.
I then finished wiring up the remaining lights and circuits with hook up wire. Then viola - a mood analyzer will change colors as you make and break the circuits!