The reply that I got from Ryobi is that there are no known problems that they know of or that have been reported except by me. (I'm kinda doubting that one.)
They say it's possible that I just got three bad ones. ( Yea, and I gotta bridge for sale here in NY cheap...any takers)
I was travelling, so the three bad lights were from three different Home Depots in three different cities. Lucky me just happened to buy the only bad P716's in each store.
Oh well, I saw a good price for some scratch an dent Epsilon EP-71's in the maketplace. I just might have to try those.