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I am thinking that perhaps the small plug-in night lights would light it up enough inside behing the song selector panels
I have a few here already - easy to rig and no heat problemos - one is adjustable as far aa light output and turns on when it is dark - but that can be adjusted too - the other one has a 6 watt light equivilent to a 30 watt stard bulb
The lights in them last forever - and they are El-Cheapo to begin with -
Yes, nightlights are the same size as the old fashion Christmas bulbs.
That’s the kind I was meaning. We sure get off topic!!