http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/ Engadget Comments for http://www.engadget.com/media/feedlogo.gif http://www.engadget.com en-us Copyright 2012 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 29th 2009 11:57PMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 7:47AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 29th 2009 11:58PMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:00AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:25AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
The first, and most prominent being that heat is a sign of inefficiency when it comes to lighting systems... How can a bulb that uses only 8 watts produce more heat than a 60-100W bulb that is giving off approximately the same amount of luminous energy?

Second, it seems that even if the bulb was massively inefficient (8 Watts of thermal heat generation), even ignoring forced convection, if you approximate the surface as a sphere... actually I'm going to stop before I start calculating the rate of heat transfer, I have a whole class for that, I shouldnt be doing it in my free time (over worked chemical engineering student here >_>)... I'll just leave it to my 'engineering intuition' (as the profs call it) to say that the bulb should do just fine without any kind of heat sink unless the materials have a far lower melting point (which is possible, comparing tungsten to an LED... but unlikely to that magnitude).

cheers


]]>Mar 30th 2009 12:49AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.lunaraccents.com/educational-LED-thermal-management.html

I believe that the octopus/doily is two fold. 1) A Heat Sink and 2) a creative way of making this bulb look similar in shape to a standard incandescent. ]]>Mar 30th 2009 1:04AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
heatsink is required.]]>Mar 30th 2009 5:01AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 7:32AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 29th 2009 11:59PMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:00AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:01AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 2:23AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100527355&N=10000003+90401+4566+4294910899

$5.85 for 4. Use a whole 6 watts more. BFD.]]>Mar 30th 2009 12:01AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:21AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.youtube.com/watch?v=Tv59PJ30WeM]]>Mar 30th 2009 4:23AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/CFL Bulb breaks in your fridge (not counting the temp problem) Enjoy at your own risk
]]>Mar 30th 2009 12:36AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 3:33AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 3:32AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/>>This video is a must see.

[[Citation required]]]]>Mar 30th 2009 9:57AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:08PMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:10AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:52AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/]]>Mar 30th 2009 1:28AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:48AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
Those don't flicker]]>Mar 30th 2009 2:21AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/]]>Mar 30th 2009 12:52AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
This has MUCH better color rendition (ie. the light is much nicer), packs much more power, and lasts much longer (this does last lots of years going strong.. The ones you have will be either out or notably dim in, at most, a year)

Of course, this is assuming the ones you have are of the kind that have multiple small LEDs in them. That technology is considered obsolete for lighting among those of us who know about LED lighting. If you got of the ones that have only a few big LEDs and a huge heatsink, then congrats, you got the deal of the decade.]]>Mar 30th 2009 2:28AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
At the cost of that LED, i question whether it really lasts as long as it says. Often, companies push profit margins too far. I already get plenty of bulb failures from CFLs, and high quality LEDs are hot enough to need actual heat sinks to cool them. I'm all for saving money but i think ill wait this one out. Claiming stuff on paper =/ real life. ]]>Mar 30th 2009 1:00AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 2:39AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Apr 9th 2009 2:11PMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 1:03AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 7:49AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 1:15AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
LEDs can still melt or burn out ahead of claimed lifetime if there's no heat-sinking. Too little or too much heatsinking can certainly affect lumen output and color rendering while it's still burning though. ]]>Mar 30th 2009 7:56AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
Supposing I wanted to replace only the commonly used bulbs with LED bulbs, that would run about $1,000.

What a joke. I might be willing to spend up to $10 per bulb (Total of $80)... but for $1,000, I'd be better off lighting my rooms legions of Olevia HDTVs.]]>Mar 30th 2009 1:29AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 3:33AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 1:46AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
The Z-Power P7, a common LED among high-power LED enthusiasts, has a CRI of 70: http://www.seoulsemicon.com/en/product/prd/zpowerLEDp7.asp

Very cheap CFLs have less than that]]>Mar 30th 2009 2:37AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 9:50AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
As for this LED bulb, nice efficiency and I like the style of that heatsink. With all those little holes the heatsink actually reminds me of a gas mantle (and no, I'm not old enough to have seen one of those outside a museum). LED bulbs should be good for situations where CFLs aren't really suitable because the light's turned on and off frequently. Unfortunately, the price is still a little high.

]]>Mar 30th 2009 1:23PMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 2:30AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 2:58AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 3:12AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 3:17AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 3:25AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 5:06AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 12:03PMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/
http://store.earthled.com/collections/earthled-evolux]]>Mar 30th 2009 5:35AMhttp://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/http://www.engadget.com/2009/03/29/geobulb-led-light-bulb-uses-just-eight-watts-rings-up-at-120/Mar 30th 2009 5:38AM