Thanks a lot guys for your different opinions about Reverser Unlocked light during takeoff roll. Just one thing I want to point out, and makes me rethink the subject over and over. That was the accident of a Fokker 100 in Sao Paulo (CGH) in 1986. The cause of the mishap was a Reverser Deployment after rotation with a fatal outcame.
Thanks again for the help,
H. C