What do you think about a powerfull light source like Wrath lamp from factorization or Arcane lamp from Thaumcraft? It can be made like a real life 1 kW light bulb and run on Bluepower energy net in the future. Here's RL example http://tmp.avr.net.ru/lamp.jpg and ugly techne model http://i.imgur.com/vuK2HTi.jpg (copper rods and tungsten string are main parts). Light bulb placed inside a lantern or any glass conteiner.

I like this idea.. Mostly the fact that it'll cost you power

Good idea. I always liked the idea of lights that use power.

Like the idea :D

Glowstone is like free light. If you want more you have to pay =)

and a use for tungsten ;)