EFOS N2000 Novacure Ultraviolet spot curing light source. This unit has a radiometer to regulate light intensity. One pole of the light guide is placed at the light source and the other is placed in the radiometer to adjust intensity and set reference. The pole inserted into the radiometer can then be used for curing at the set reference. Radiometer may need calibration to meet OEM specifications. We are unable to test the accuracy of the radiometer or calibrate it.