Developed in partnership with LG Innotek, advanced engineering exclusive to OPI. OPI Dual Cure Light is optimized to work with all OPI gel systems. Two light frequencies work synergistically to provide the optimal shine and wear. Have client insert hand into the light. For proper curing, place fingers on designated ledge on the hand plate with the thumb pad resting on the ramp. Avoid placing the thumb behind the ledge, instead place your thumb on top of the ledge. Angle it upward toward the light for proper cure.