Forum DhammaCitta. Forum Diskusi Buddhis Indonesia
Komunitas => Ilmu Pengetahuan dan Teknologi => Topic started by: kullatiro on 02 May 2011, 09:38:37 PM
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Out With Watts, In With Lumens
Wattage used to be the simplest standard for judging a light bulb’s brightness, but no more. Alternative lighting sources like LEDs and fluorescent bulbs produce light while using far less power, and even incandescent bulbs have improved in their efficiency. So it’s time to stop comparing apples and oranges, and instead focus on a consistent measure of how much light is being produced: lumens.
Lumens offer a standardized measure of light output, and as manufacturers begin to list lumens instead of wattages on bulb packaging, consumers will be able to more accurately compare the performance of different products regardless of their energy usage.
(http://www.metaefficient.com/wp-content/uploads/2011/01/ftc-light-bulb-packaging-labels.jpeg)
New Federal Trade Commission guidelines for light bulb packaging will further assist buyers: by mid-2011 other information in addition to lumen output will also be clearly labeled, including annual energy costs and a bulb’s typical lifespan.
http://www.metaefficient.com/leds/light-bulb-efficiency-guidelines.html (http://www.metaefficient.com/leds/light-bulb-efficiency-guidelines.html)
tambah tambah pengetahuan keluar standart baru di luar negri tentang lampu
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Lumens, udah lama kali jadi standar