Here's an idea: Why don't we take the painter, add a special dye, and use it to paint blocks with a conductive strip, not too powerful though, just enough to power luminators. It would save loads of time and effort charging them up manually, and save space.
Conductive Paint:
= 1 Conductive Dye
Paint Coulouring:
Conductive Dye + Dye(lapiz, rose red, etc.) = Coloured CDye