David, Perhaps in your modeling prgram (Not familiar with the one you use) you had an ambient light or and ambient channel on your object when you export them.
Or you can do the long and arduous way of editing by hand.
Below is a picture of one of ur models in notepad.
The Blue box shows all the material data for the object.
The Data Highlighted in Red is the
Ambient Data for the object. If you set all that to 0, your object will look fine.
[EDIT] I've done it for you, thought i may do something for you as your doing so much for everyone. Attachted in thread