You would've seen their first varilite tour on your 1981 Abacab show.
Great set of gigs there, including Gabriel and The Lamb. I'm wondering if anyone else on the board saw the band with PG still in.
You may be correct. But they were much more developed in 1983. I think these must be the early stages of LED lighting. I think the guy who created them is Mark Brickman.
I was fortunate to see Gabriel with Genesis four times (unequaled).