I can see you play rather clearly

Ladies & gentleman, presenting to you, Master Beez with his twinkler guitar effect. The LED in the guitar activates every time there's enough current generated by your hard picking. The application is rather clear; you are the centre of attraction because the light's on you... em... FROM you rather, every time this happens. To avoid being labeled a qualified moron when you have the lights on during day light performances, the twinklers can be switched off. How much battery space should be considered for the twinklers? Not much, because the batteries are button cells, which look like this:

There are two options; you can either have the LEDs directly in the pickguard/ scratchplate as depicted in the clip above or you can have Beez insert them in pickup covers so from a distance, it looks like a regular pickup but it's really a decoy.

So in an attempt to rival your band's other guitarist whose fretboard dot markers light up in dimly lit venues, you'd rather be more adventurous & exert some control over those twinklers by adopting this mod instead. Enough said. Be seen from the moon when you play.