@EcpliseTVLights - it's a 70" TV, hung 1.25" from the wall. 63.6" wide by 36.5" tall. I've got the lights attached with scotch tape for now. I was concerned about coverage when I simply held them out in front of the TV, so I played it safe.
I was able to get the two lower side lights to the bottom of the sides by angling the top side ones (not quite, but close to 45 degrees), that's whiy the side top lights are much dimmer ... they're set much further "in" on the back.
I got caught up in the Women's College Basketball tourney last night (and more to watch tonight and tomorrow). let me dig out the tape measure and do some thinking. I'm not sure two more would be enough to give an even light on this TV. I have to admit ... it IS a monster!
@flyingdog - hmm ... building up a wedge to angle the lights off the back ... interesting. I hadn't even thought of that! I'll have to play around with it. Thanks for the idea!