I answered your question in the other thread (just-because that is the first one I read, but yes if you dig back 50 pages or a few years in this thread I'm sure it has been asked and answered multiple times, in fact I know it has because I answered many of them.)
But yeah the -10db LED is 10% power, so you are only using like 1% of the amp. (Which has also been asked and answered multiple times too.)
I guess that's what happens when you have a thread that is 10+ years long. Long thread is long...