Just want to add my voice to the luminator crowd.
Luminators as they are right now are basically super inconvenient torches. I'd like to see one of two things.
1. Permanently powered luminators
Not as cool as having them consume power, it's true, but without redpower- which honestly I just don't like much outside the paneling - the amount of space hidden wiring takes up is crazy, especially if you want to put lights on the walls or on the second floor of a building. And using batteries on them is even more useless, 2 days is like 20 minutes. That's nothing. I'd be okay with charging them once and that's it. That would be awesome, actually. Torches that require EU input but don't suck.
2. Special features
If luminators still consume power continuously, make them do something cool like incinerate mobs ala IC1 luminators, or - I"m not sure if this is possible (probably not) but it would be awesome - make them more powerful than torches. Much more powerful. If I could light an entire floor with two luminators and put them outside to keep mobs from spawning anywhere nearby, that would be worth any inconvenience.