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44.7 x 29.7 cm ⏐ 17.6 x 11.7 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
LED light bulb. LEDs (light-emitting diodes) use about one tenth of the energy for a given light output when compared with normal incandescent bulbs, instant start-up time and have a lifetime typically of 30000 hours. This bulb has a frosted glass envelope to give a more diffuse light and a screw thread to fit Edison Screw (ES) domestic light fittings.
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