Should have mentioned this earlier. If I have replaced most or all of the globes with leds, I'd feel a whole lot more comfortable with leaving them on.

if u are worried about std bulbs ruining the backglass etc, yes, good idea, but for translites, it doesnt matter.

I have left Segas, Ballys, Williams, Gottliebs, Sterns, all different machines n manufacturers on for 3 and 4 days, non stop, just to flush out any issues, and nothing ever played up once.

If the machine is hack free, I think it is probably safe to say only a bit of bad luck will show any hassles up.

LEDs do reduce heat, which is a good thing for sure.