Detail Everlasting Light   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 407 no. 8838 (Jun. 2013), page SS9. Topik: Lighting Industry; Light Emitting Diodes; Trends Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.76 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel The usual measure of an LED lamp's economic life is its L70 rating--the time taken for its brightness to fall to 70% of its original value. Municipalities and commercial users expect to get ten years or more from LED lamps before that happens. Low-pressure sodium lamps, by contrast, last typically three or four years before starting to consume lots more power. Add to this the cost of changing an LED streetlamp--around $60, versus over $200 for a sodium lamp--and the lower maintenance costs alone can make the switch worthwhile. Like their industrial brethren, LED bulbs for domestic use will get cheaper and smarter. Already, both Philips and a start-up called LIFX sell bulbs that can be controlled remotely via a smartphone app and change colour on demand. And that is just the beginning. The LIFX can change colour to music, and the Philips Hue bulb can adjust its brightness and colour to mimic a sunrise each morning. Gimmicks, perhaps, but this sort of thing shows how lights are poised to become just another network appliance. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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