I've got that horn/lights connection with my Clearwater Krista lights too, and I LOVE it! When I blast the horn at some bozo and he gets the full-bright shot from the LEDs too, he ALWAYS knows I'm there. I'm not sure he always cares, but he always freaking knows.
I wouldn't mind having even more decibels than the after-market car horns I have on, and this one sounds nice and loud, but like you other guys, I don't want to wait. It takes me long enough to get my thumb over to the horn button as it is.
a link to a vid I shot to show it all off, along with the dimming feature. It should get your attention.