[lojack]

I like this effect, but not because of changes to the perceived contrast. Often people turn off the lights during movies and this always bothered me because I lose my point of reference. It actually tends to give me nausea to have the only light coming from the TV. Having some sort of light whether its this, a nightlight, or a soft light from a different room tends to prevent this nausea.

[vanderZwan]

> It actually tends to give me nausea to have the only light coming from the TV. Having some sort of light whether its this, a nightlight, or a soft light from a different room tends to prevent this nausea.

Finally, someone else! People always give me strange looks when I complain about this.

[dublinben]

Bias lighting is well understood in the professional video industry. Your intuition is spot on. These products, however, do not work like they ought to.

http://www.cinemaquestinc.com/ideal_lume.htm