SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Energy-saving light bulbs. Two different types of compact fluorescent lamps (CFL) or energy-saving light bulbs including a spiral type (left) and a rounded type (right). The spiral type is 11 watts and is equivalent to a 60 watt incandesent bulb. The rounded type is 15 watts and is equivalent to a 75 watt incandescent bulb. Fluorescent bulbs produce less heat than filament bulbs, therefore more of the electrical energy is converted to light, making them more efficient.
Model release not required. Property release not required.