Looks nice your coworker should like it.
look on Amazon. prices are very reasonable!
This is what I use for my lithos.
http://lithophanelights.com/store/
Nice job. Can you also show a pic with the lights on. I want to see the box itself.
I get my lights and power supply from here http://www.ledlightsworld.com. I like the fact that the power supply has an on/off switch, beats having to unplug it all of the time.
The part #s are HK-IDB-PS-12-X 110-220V AC to DC with Switching Power Supply
HK-DC-Plug DC Female Plug Cable
I have gotten pretty good deals off ebay for rolls of LED's. Have always worked well for me. Just need a 1 amp 12 volt DC power supply. I got lucky and picked up a whole box of power supplies at Audio Technica when they had their warehouse sale a couple of years ago. Think I paid like $2 or 3 a piece for them. I also purchased the connectors for the power supplies off ebay, I don't bother with a switch.
CarverJerry
ver. 1.188 Win 7- 64b with 6 GB ram @ 2.8Ghz and dual 1Tb hard drives. Rock Chuck & Ringneck vacuum system hooked up to a Harbor Freight large vacuum. Center line text, conforming vectors.
It's cheaper to buy by the roll. They can be cut every third led so you can cut to which ever length you need. The site sells all the hook ups and power supplies you need. Sometimes I use rocker switches from Radio Shack for on and off or just unplug. You can get as fancy or simple as you want.
George