A method has been invented for curing polymerizable compositions by irradiating them with pulsed light emitted from at least one LED. For example, when the composition is accurately set in position (i.e., tooth cavity), a polymerization reaction is photoinitiated to harden the substance. Applications: Dental (adhesion, sealing and restoration)Assignee: New Photonics LLC (Dover, Del.)Inventors: N. Melikechi and R. PandherFiling/Publication Date: 02-11-05/08-05-08