Some industry players I know:
Philips bought out Genlyte in 2007, they have a ton of brands.
DVI Lighting (residential consumer)
Bazz Lighting (residential consumer)
Heath Zenith (residential outdoor)
For more, just go to stores and look up the companies. I think there is good deal of turnover so just get your resume in the office and you will be on top of the pile when they start looking.
"Our inventions are wont to be pretty toys, which distract our attention from serious things. They are but improved means to an unimproved end, an end which it was already but too easy to arrive at...." Thoreau