Next to Interstate 15, about 45 miles south of Las Vegas, sit three mysterious structures that look like gigantic table lamps giving off blinding light.A pet peeve on lengthy road trips is that installations like this should have signs explaining what they are. You could Google it, except that’s dangerous while driving, plus cell service is sparse at the edge of the Mojave Desert.It turns out the lights are part of the Ivanpah Solar Electric Generating System, owned in part by - get this - Google. The intense light comes from three 460-foot boiler towers that use concentrated sunlight to heat water and generate power.