So after using luminators in a few different ways, here's some suggestions I have for them.
1) Make them charge faster by hand... either flat out faster, or faster based on the energy device used (battery slowest, lapotron fastest)
2) Make their charge last longer (not consume more energy, just make the energy last longer), as I think they should be less of a maintenance deal.
3) Is it possible to increase their light range? As it stands now, there is not much incentive to use these over the other light sources like glowstone, or jackolanterns, or RP2 lights. I think the reward for using a power-consuming light source would be more light from a single block. I think if the luminator was capable of putting out a light level of 18 (effectively 15 for 3 blocks), it would make more sense to be putting our precious power into these things.
Here's hoping!