Here's what educators have to say:
The effectiveness of using a patient simulator to teach light- curing skills
by Price RB, Strassler HE, Price HL, Seth S, Lee CJ.
The Journal of the American Dental Association
Effective Use of Dental Curing Lights: A guide for the dental practitioner.
by Ferracane JL, Watts DC, Ernst CP, Barghi N, Rueggeberg FA, Shortall A, Price RB.
American Dental Association Professional Product Review
Succesful Light Curing- Not As Easy As It Looks
by Strassler H.
Oral Health Group