Posted on 06/25/2007 3:08:11 AM PDT by Wiz
ping
“I called Cranes and went to a local electronics specialty shop and could not find any LED products. I am still waiting for products to emerge.”
http://www.ccrane.com/lights/led-light-bulbs/index.aspx
http://www.theledlight.com/dragon-fish.html
This Dragon Fish LED lights may be “vaporware”. They have been promising it for months... and no bulb. It’s now promised for Sept. It certainly is too expensive at this point.
http://www.livescience.com/technology/050324_solar_lighting.html
Thanks, I should clarify. I have some decorator type lamps in the living room that take the smaller diameter threads, i.e. small output bulbs. I did find something with more output, but not LED.
ping
ping
If he heats with electricity this saves him no money on his electrical bill during the heating season, which is much of the year in MA. The "wasted" energy of the "less-efficient" incandescent or fluourescent bulbs is in the form of heat, which when using LEDs must be replaced by the furnace.
OTOH, the LEDs lack of waste heat saves on cooling costs as well as lighting costs during the summer.
Crane quotes the highest output screw in LED assembly (not reflector type) as 60 lumens. (Lumens are a measure of light output). These are 2.5 watt power consumption at 120V.
A 100w incandescent soft light bulb runs about 1200 lumens. A 100w halogen is 1600 lumens. A 23w CCFL bulb has about 1500 lumens output.
So, if one is to duplicate the useful light output of a standard 100w incandescent bulb, it looks like you will need 20 LED assemblies to yield 1200 lumens. Or, to match a 23w CCFL bulb you will need 25 LED assemblies for 1500 lumens.
So, unless I am missing something here, these drop-in LED replacements don’t provide much light output.
There may be an issue with illumination angle, as the LEDs could provide focused light intensity for spot lighting, whilst the incandescents and CCFLs are omni directional.
Jack
Typical reporter lack of knowledge about his subject. Halogen lights have a wire filament, threfore are an incandescent lamp. Only difference is they have a gas of the halogen family added to the bulb to allow the filament to run hotter than normal without premature burnout.
See here:
I do alot of work with them on “product in place” research and testing.
B4L8r
Here is my professional view about LEDs, about 8 years ago or so I accidentally found myself in a position building then LED flashlights I personally modified from existing bulb types, I had numerous versions and other experiments including using laser diodes in cartridge cases for bore sighting purposes, these products are currently on the market. At first it was an open playing field but soon the Chinese flooded the market and I withdrew and ceased building any new prototypes.
Its all about corporate greed and high profit margins. You will not for the most part find a LED type of lamp with an output near a conventional bulb in Walmart, but they have been available for many years. Anybody with some minor electrical background in auto lighting can buy 12v white or colored LED lamps from Ebay and a regulated 12 volt DC power supply and build a home lighting system, I did many years ago. Its the Walmart curse, we won’t really see useful technological products in the big box stores until they can be made ultra cheap and thats usually at least a year or two after their is a public interest.Its also the gullibility factor, recently we were lectured CFLs were the wave of the future but in pure reality they are a dangerous product to dispose of. Mercury being a toxic material, LEDs however are almost entirely made from solid material like epoxy resins and have except for some designs no dangerous gases or materials. Introducing high output LED lamps at this time would disrupt many areas of other consumer goods, right now there are new RPTVs with LED lamps that are more efficient than other DLP lamps that have a life of around 6,000 hours. Many new cars have marker lamps of LEDs, that now decreases the demand for replacement bulbs, flashlights usually had an hour or two of battery run time, now with LED lamps its measured in months, less battery sales. Trafficlight systems are mostly LED now, lamps now last over 5 years and less people needed to change lamps thoght technically a traffic signal may not need a “lamp” replacement if LED for well over 10 years.
Introducing high output low cost LEDs on the market right now is on a comparison to being able to buy a new car that ran on tap water and was affordable to anyone like buying a bicycle, almost totally maintenance free and not needing expensive fuels or replacement parts.In the real world its a sad fact that there is a stranglehold on consumer products that we the consumer are blind too, we have been lead to believe we need to constantly buy products that require high maintenace costs like printers and such. The smart consumer would do best to abstain from living off the the “affordable” goods coming from the big box stores like Walmart, instead research for instance what boaters use for lighting, myself I buy very few high end items from Walmart, for the most part its Mobil 1 oil, laundry detergent and Gatorade, with the current love of high profit margins a place like Walmart is just an outlet for Chinese goods made cheaply and with many possible hazards of toxins and such due to the low standards.
Currently Ebay is a good place to get LED lamps, I tell all my friends to look there, plus the shipping on most items are small.
FR *bookmark*
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I’m suspicious of a 32 year old single male living in a loft.
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