Posts Tagged ‘LEDs’

LEDs make it cheaper to blind family and friends

Tuesday, May 31st, 2011

Freedom of choice: Lots of LEDs at Yamada Denki

The government wants you to save energy this summer because of the mess they’ve made up in Fukushima. The request is for you to reduce your consumption of electricity by 15 percent. Just in time for this setsuden (electricity reduction) season, the price of LED lamps is coming down. When LEDs first appeared on the market in 2009 the average price of a bulb was ¥3,827, according to the Light Bulb Manufacturers Association. The average price as of March was ¥2,274. Moreover, discount stores like Aeon and Don Quijote sell the 60-watt types for about ¥1,650.

Of course, when you say “60-watt type” you have to qualify the designation, since a 60-watt type LED does not, in fact, use 60 watts. Neither does a fluorescent bulb with that designation, which is still used because consumers are conditioned to think of a bulb’s brightness in terms of wattage, since that’s how you measured relative brightness with incandescent bulbs: the more power, the brighter the illumination. The same goes for fluorescents and LEDs but the proportions are much different, making comparisons almost pointless. For instance, a 60-watt type LED uses about one-eighth the power that a 60-watt incandescent bulb uses, but the brightness in terms of lumens is about half. The light bulb industry would prefer that you choose a bulb based on lumens, since the “XX-watt-type” designation is basically meaningless in the LED age.

Continue reading about LED light bulbs →

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