Stumbled onto something on Lord of the Light tonight. Af first I thought the pro I've been playing on location had a bad right outlane switch. Then it started working again and the left outlane stopped working wtf? Tonight I went through instant info midway through a ball and right after it said how much gold I had, the LOTL screen said how to light it, then said at the bottom:
Already used this ball
So it looks like you can use it once per ball, but it still stays lit. Kinda like when you max out EBs on a Stern and they keep lighting and collecting, but don't award. Hopefully they'll turn off the lights once it's collected in the next update. It's definitely confusing.