Robin,
I wish you had gone ahead and informed yourself with the four informative links that were provided.
It never hurts to learn more about new tactics and technology.
Everything I posted is absolute truth...no rumors or disinformation.
I'll include the links again so that any others interested can verify my claims.
One other thing; I never said 'absolute total darkness'. Even night vision technology is a poor identifier
between the enemy or friendlies.
I said 'no light' situations....And as an expert, you very well know the difference.
Like others, I've learned that it's tough to convince old timers to accept or try new technology
and new methods, but like computers and the 'net, sooner or later, most everyone figures it out.
My best to you and your students.
This will help with understanding:
http://www.crimsontrace.com/5things.pdf
This holds a wealth of information:
http://www.crimsontrace.com/
This tells it like it is:
http://www.crimsontrace.com/mtsvid.wmv
This is a defense training/information video:
http://www.crimsontrace.com/ltdt.wmv