We get an illuminating look at the next generation of light bulbs. Rodney Heller is the lead lighting designer at Energy Performance Lighting, based in the Madison area. He's been a member of the Illuminating Engineering Society of North America since 2007 and served as President of the Madison section for the last two years. He's also produced a new TV special, Electric Light: Dawn of a New Era, which aired on Milwaukee Public TV. Heller spoke with Stephanie Lecci.