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Design and lighting technology

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Abstract

The applications of LED lighting technology in combination with appropriate plastics, in automobile industry, are discussed. The use of LEDs in daytime running lights for all new EU cars including Audi, provides enhanced safety by improving the ability to be seen by other motorists under unfavorable traffic conditions. The fast response time of LEDs in high-mount brake lights provides a real gain in safety due to quicker recognition of the situation. Audi has introduced the world's first headlight that achieves all front lighting functions through use of LEDs, in addition to daytime running lights, the turn indicator, low beam and high beam. Other benefits of the LED technology include low energy consumption, daylight-like color for more contrast and pleasant perception, durability, low voltage requirement, compact size and greater design freedom.

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... Lighting designers know that as people age, greater lighting levels are required, because less light reaches the retina (Noell-Waggoner 2006). And E Source has found that manufacturers often exaggerate the lumen equivalence of CFLs-e.g., claiming that a 13-watt CFL has the light output of a 60-watt bulb-and that the lighting quality may be affected adversely by lamp age, position, temperature, and other factors (E Source 2005). Taking these factors into consideration, we suggest that program administrators should be careful not to oversell the benefits of CFLs and should consider education and messaging oriented to the needs of older consumers. ...
Article
A nationwide U.S. sample of residential consumers completed an Internet-based survey that included four questions pertaining to their use of compact fluorescent lamps (CFLs). The questions addressed: • The number of CFLs in use in the home • Reasons for using CFLs • Views on the quality of lighting from CFLs • Plans to purchase CFLs in the future Demographic data on respondents and their households was also obtained. Using this rich data set, we found that CFL usage differs significantly across the states and is distributed unevenly across households, with 21 percent of households accounting for 76 percent of all CFLs in use. Usage is positively correlated with age, income, education, and the length of time people have been in their current home. The opportunity to save on electricity costs is the dominant reason cited for using CFLs. Those who use CFLs are, on the whole, satisfied with the quality of light—over three-fourths say CFLs are the same or better than incandescents— but dissatisfaction rises with the age of the user. Evidence for a "gender gap" in men's and women's views of CFLs is equivocal, as men report higher usage, but women's views on quality and intention to purchase are very similar to men's. Focusing CFL marketing programs on customers who are not using CFLs should be fruitful, because customers who are using CFLs at any level—even just one per household—are significantly more likely to plan additional CFL purchases.
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