I was reffing a ME pool in a local E/Under last weekend. Bout came up with an excitable teenager against a laid-back vet who hadn't competed in awhile. The kid had a whole slew of friends on the sidelines rooting for him. He boasted to his posse that every time he got a touch, he was going to yell "ka-POW!". Which he did, for the first few touches.
He was at the C and under this weekend wasn't he? Fricken kid beat me in pools.
I don't know how the number of lights figures into it.
If you don't get a light on in one tempo it's a moot point in sabre. Any riposte would be locked out anyway, even with an intact blade. The ref can just phrase his construction to make that the determining factor, rather than whether the blade was whole as the action happened or not.
I sense that I'm not explaining this well.
Use the Shift key, people! Keyboard manufacturers everywhere are ineffably saddened when you ignore what they made just for you!