Image of businessman looking at light bulb. Green energy concept

• alternative, bulb, concept, conservation, consumption, earth, eco, ecological, ecology, electricity, energy, environment, environmental, flower, friendly, future, glass, global, green, human, invention, lamp, light, lightbulb, male, man, natural, nature, planet, plant, power, process, protect, recycle, renewable, resource, responsibility, reusable, solar, solution, sunlight, sustainable, symbol, technological, technology, tree, warming, white
• ID: 150990416
• Published: 22Aug2013
• Model: 13997855
• 8000 x 5268 pixels