はてなキーワード: Chicago Tribuneとは
株式会社ショージ http://k-syoji.com/signal.html
おそらくは従来型の300mm径の話
消費電力 13W(平均)
コイト http://www.koito-ind.co.jp/new_product/pdf/flat-signal-light.pdf
According to this Chicago Tribune column, a 69W incandescent bulb is replaced by an LED version that dissipates only 11W – an 84% savings.
LEDsマガジンによるシカゴトリビューンの引用 http://www.ledsmagazine.com/articles/2010/01/led-advantages-outweigh-potential-snow-hazards-in-traffic-signals.html
Today’s LED traffic lights are rated at just 10-25 watts — compared to 175-plus for their predecessors.
GEEK.COM https://www.geek.com/geek-cetera/led-traffic-lights-fail-at-handling-winter-1587882/