Hi,

The IR pen should not have any visible light as the emitted light is in the non-visible region (infrared).
To test your IR pen, you can use your mobile phone's camera to check. You should be able to view the light emitted by the IR LED through the phone because usually the camera is also sensitive to IR light.

The tracking utilization is dependent on the calibration that you have made.

When you calibrate the software by clicking on the 4 points shown on the screen, the software will be able to mathematically determine the position of the screen in respective of the Wiimote's view.

Tracking utilization of 8% is too low and you should try to achieve a higher tracking utilization.

For more details on the calibration you can visit,
http://boonjin.com/smoothboard/index.php?title=Mount_and_position_the_Wiimote

http://boonjin.com/smoothboard/index.php?title=Calibration



Regards,
Boon Jin