Hi again, Just to clarify, I assumed that 1 is intensity knob turned all the way down, and 10 is intensity turned all the way up. 5 is between the two. I didn't use a clock face, just a 1 to 10 scale. Mary to view the list archives, go to: www.freelists.org/archives/optacon-l To unsubscribe at any time, just send a message to: optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the quotes) in the message subject. Tell your friends about the list. They can subscribe by sending a message to: optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the quotes) in the message subject.