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3 / 10 page R_10018 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Report Rev. 1 — 20 December 2011 3 of 10 NXP Semiconductors R_10018 Smart lighting: a bright idea whose time has come 1. Introduction The increasing cost of energy, concerns about global warming due to CO2 emissions, and, more recently, supply issues resulting from natural disasters, such as the earthquake in Japan, are driving energy-reduction programs. Lighting, which represents up to 25 % of home energy usage, is a natural place to start when looking for ways to save on energy. The transition to newer, more efficient lighting technologies has already begun to replace incandescent bulbs. Compact-fluorescent lighting (CFL) and Solid-State Lighting (SSL), two of the most popular alternatives to incandescent bulbs, are now commonplace in homes, offices, retail spaces, and along city streets and highways. A number of governments around the world have even passed measures to phase out incandescent bulbs entirely, so it is likely that CFLs and SSLs will continue to grow in popularity. The latest CFLs and SSLs are equipped with very compact, relatively inexpensive driver ICs that deliver even higher energy efficiency (more lumen light output per watt of energy input). The control circuitry adds a range of other benefits, including improved system reliability, ‘boost’ functions that reduce start-up time, deep dimming capabilities, and extended lamp lifetimes (12,000 to 15,000 hours for CFL and over 35,000 hours for SSL). These next-generation CFLs and SSLs have already had a tangible impact on energy consumption, but there is more that can be done. Building on the concept of using driver ICs to improve lamp operations, there is a way to save even more. By adding wireless IP connectivity to the driver circuitry, it is possible to create a more intelligent light bulb. The new approach makes it easier to manage energy consumption, because individual lamps can be used only when and where they are needed, and at the right brightness level. Also, the wireless approach provides a simple way to implement a smart lighting network in existing residences, so even older homes can take advantage of the new concept. 2. An internet address for every bulb Figure 1 shows a home automation network that uses smart lighting. Every lamp has its own IP address and can be wirelessly controlled by an IP device, such as a smartphone, tablet, laptop, or Internet-enabled TV. This makes it possible to create a highly personalized, intelligent lighting environment. Lights can turn on and off when and Fig 1. A smart lighting network |
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