The unicam tool we have has the lighsource built in to the crimper. It gives a green light when the connector has been crimped properly. Like others have said we used to have some failures using the old tools. This could have been possibly the clever life running out. The Corining rep also told us you should never have a failure using unicams using the new tools and Corning would reimburse money and any that did fail.

Technician I IBEW Local #58 Detroit, MI