S!
I use super bright IR-leds (invisible to human eye), M$ VX-3000 cam with IR-filter removed + 2 layers of diskette as visual light blocker. No matter the lighting conditions, always works perfectly.
Only thing I had to adjust in the FreeTrack program was the Threshold, and the sensitivities for each axis. ... Disabled the Z-axis (movement and translation), don't like it
EDIT:
The leds I use have a somewhat narrow effective cone of IR-light out of the box, so I did some tuning with fine grain sandpaper. Made the tip dome non-clear so it will radiate more to the sides. Makes it possible to use more head movement and angle.