My first thought when reading the post was "AWESOME", I love energy/money saving ideas. My next thought was "is this really economical, even over the long hall?" Math isn't my strong suit but I found a great website where you can do your own calculations...check it out for yourself...http://people.westminstercollege.edu/departments/science/Explorations/Lesson_Schedule/Assignments/Lights.htm

I would have to see the light bulb compared to the incandescent it is replacing. I purchased one of the early generation led light bulbs and found it to be pretty weak. If it works as advertised I'd replace all the bulbs in my house (as they burnt out). Then no new bulbs until 2028.

I actually just spent $44 on a GE Energy Smart 10-watt (65w incandescent-equivalent) LED Floodlight, the box says it'll last me 12 years @ 4 hours per day, but where I put it (bedroom hallway), it'll be lucky to see a single hour of usage per day (Which means it should last 48 years, if I did the math right). It's pretty bright too, and the color temperature is almost the same as the 65w incandescent bulb that was there before. It's hefty, too, with it's metal base that doubles as a heatsink for the four almost-as-big-as-the-end-of-your-pinky-sized LEDs inside it... Other than the fact that it's $40/bulb, it's cheaper to power, lasts longer, and it puts out almost the same amount of light. If you have money to burn on lights, IMO this is the way of the future.

Phaux - ...where do I begin...

A. Congratulations on wasting money, you seem to be proud of that fact.
B. Also congrats on solving that tough math equation.
C. LED's produce virtually no heat (hence the efficiency), which means it wouldn't have a heat sink...since theirs no heat to get rid of.
D. It doesn't put out as much light, or have an eye pleasing color like the incandescent bulb.

*I normally dont rant...but that post deserved it*

Congrats to Phaux on actually trying some of the new generation bulbs.
And to murc, you are wrong on most counts. I suggest reviewing the datasheets from the LED manufacturers, such as CREE.
To address your points:
A: Do the math, investing in efficient lighting is a cost savings
B: Why the harshness on mathematics?
C: LED lighting products DO indeed dissipate heat from the Die, which has thermal constraints, and the drive electronics. These must be designed to run in an environment with elevated temperatures and little airflow, hence the need for a seemingly large heatsink.
D: The new generation of high output LEDs are available in a wide range of color temperatures. The drive electronics are better at keeping the light output at the desired temperature, over a dimmable range, as well.

LIfe is short. Start learning.

I see a disturbing trend with LED traffic lights, LED tail lights, and even the little USB keyboard lamp I have for my laptop: The LED's may last a lifetime, but if they do, then the low-quality resistors and driver circuitry that China puts in the devices often burns out in a matter of months.

The new LED traffic lights in our town - EVERY ONE OF THEM - have big blotches of LED's burnt out. I see new luxury cars with LED tail lights burnt out in places, and my laptop light blinks like a strobe as it gets hot. On the other hand, I've never had a problem with my LED tactical lights I carry on patrol - If any LED's are over-driven, it's a SSC P7 flashlight at 900 Lumens - go figure.

I bought a case of Compact Flourescent 100W equivalent bulbs on eBay for $1.59 each.They work a LOT better than the frst CF bulbs I bought 20 years ago - No start-up flashing, much better color, and very small for the brightness. FINALLY they have reached the stage of tungston bulbs after 20 years.

So I figure I might try another LED bulb in 20 years - The one I tried costs $40 and is more suitable for "mood lighting", nowhere near bright enough to read by.

I've no doubt that will change - But unless they use 5 or 6 of those SSC P7 LED's, which would be awfully expensive and would get very hot, I don't see LED competing with the CF bulbs for a long time.

This is nothing new. These bulb's last 40,000 hours. There are LED bulbs that last 50,000 hours already for sale for the same or less.

http://www.earthled.com/

A few months ago I started doing some research with the idea of finding some LED light bulbs to replace all the bulbs in the house.

While thier initial expense (usually between $40 and $110) can be recovered ,and then some, in time. Most aren't any where as bright as a standard incandecant bulb. For example, these panasonics offer a range of lumen values the highest being 570 Lumens. A standard 60W light bulb is 850 Lumens.

If you want directional (like flood lighting) lighting you will have a much easier time finding LED bulbs that match equivalant incandecant bulbs.

I did manage to find a manufacturer that made LED bulbs with 900 lumen ratings in a regular bulb format, however those were $85 a bulb and way out of my price range.

I did read a few months ago that someone at MIT had figured out a way to make LED's at a tenth of the cost, but we will see if that ever pans out.

For these expensive lights, to get your "payback", they have to also be high usage. I have slowly changed over many of my high usage lights to CFL's (with a good warm color).
My high usage lights are:
hallway lamp that is on a X10 timer
Floor lamps that are on most evenings

I look forward to replacing outdoor floodlamps that suck 100W or more apiece. There are PAR38 24watt LED's, but at aourn $90 - $110, I'll wait... too long to recoup the capital outlay. Prices will come down over the next few years, so that when one of them dies early (but still outside the warranty), it won't be too painful, and prolong my investment recoup period.

your led lights products attract me .
i am chris form A-rolux which a led lighs factory in china.
so some of your led bulb we could supply for you.
sales2@a-roluxled.com.www.a-roluxled.com.