By International Energy Agency
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Extra info for Light's Labour's Lost: Policies for Energy-efficient Lighting (Energy Efficiency Policy Profiles)
This may be a surprising finding but it reflects both the fact that the share of residential lighting provided by incandescent or fluorescent lighting varies considerably from one region to another and the fact that fluorescent lighting has been increasing its share of residential lighting in almost all countries over the last few years. While many of the earlier barriers to the development of the CFL market (high price, lack of dimmability, a history of “cold” colour output, relative bulkiness and a narrow range of decorative forms) have been fully or partially addressed, there are still ongoing barriers to be tackled.
6. The value of avoided summertime air-conditioning loads as a result of less heat from efficient lighting is usually greater than the increase in costs for extra wintertime space-heating demands because (i) globally, more utilities are summer peaking than winter peaking, (ii) peak power is more expensive to service than is demand at other times, (iii) electricity is much more expensive to store than most heating fuels, and (iv) electricity is the only practical means of powering air-conditioning, but many fuels can be used for space heating.
The light emitted by 36 OVERVIEW AND RECOMMENDATIONS outdoor illumination devices has become so pervasive and is so poorly directed that in most of our urban environments it is no longer possible to see the majority of stars at night because the glare from artificial light is scattered back from the sky vault. Light pollution is not only a waste of light energy but also diminishes our perception of the wider universe. A variety of simple remedies exist but are seldom employed, mostly because there is a lack of awareness of the issue.