Ключевые слова: 468, alternative energy, color image, concepts, daisy, economical, efficiency, electric light, electricity, energy, energy efficiency, energysaving, environment, environmental conservation, flower, fluorescent light, focus on foreground, fuel and power generation, glowing, grass, green, lawn, light, light bulb, lighting equipment, meadow, nature, nobody, outdoors, resourceful, savings, side view, single object, spring, summer, symbol,