3. LED Based
Mectron Starlight Pro ($500)
[1] http://www.mectron.com/starlight-pro.451.0.html
[2] http://www.kabdental.com/small-dental-equipment/curing-lights/bonart.htm
Halogen Light Based
KAB Dental ($300)
4. Contraption Device: Built with white board marker
LED Based
Bill of Materials - $2 (Two dollars)
Note: Preliminary test with this device, show promising curing results