From Wikipedia:
"In Issue #10 of Warren Ellis' Planetary, "Magic and Loss", there is a race of red-robed beings providing blue lanterns to those worthy of being "Policemen." One noble alien is selected, and a glowing blue lantern (a "mind-powered weapon") is placed within his chest. The alien, now capable of space-travel, heads to Earth where he is captured, vivisected, and has the blue lantern extracted by Dr. Randall Dowling of the Four, after having his powers nullified through the use of red-hued light.
Following this, Lamplighter gained the power of the lantern and joins the group Stormwatch, which is a parallel of the Justice League. "