That's a great idea. If that works on inverted lamps too, it'd be perfect.But recently I found that you can take a glowstone block +saw and carve it up into microblocks. Then place those around your base as needed. 1 glowstone block will get me 16 strips. Each strip gives light like a normal full block of glowstone, so that gives you a 16x multiplier, so it doesnt take too many full blocks to light an area.