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| Light bulb
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Incandescent lighting element, which converts energy, inside a glass container, to light by use of a filament heated by electrical resistance. |
| Light center length (lcl)
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The distance between the center of the filament or arc tube in a lamp and a reference plane-usually the bottom of the lamp. |
| Light diffuser
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Translucent piece of glass or plastic that has facets to spread out the light, expanding it to cover a bigger area with a wide swath of light. |
| Light framing
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Use of lumber, four inches wide or less, to frame the structure of a house or small building. |
| Light handle switch
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Electrical switch, which can be seen in the dark, by virtue of the small neon light glowing in the toggle part of the switch. |
| Light intensity meter
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Apparatus, often used by photographers, to measure the quantity of light in a given area. |
| Light quality
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A description of how well people in a lighted space can see to do visual tasks and how visually comfortable they feel in that space. |
| Light trapping
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The trapping of light inside a semiconductor material by refracting and reflecting the light at critical angles; trapped light will travel further in the material, greatly increasing the probability of absorption and hence of producing charge carriers. |
| Light-induced defects
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Defects, such as dangling bonds, induced in an amorphous silicon semiconductor upon initial exposure to light. |
| Lightfastness
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No loss of color due to exposure to light, heat, or weathering. |
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