LED Screw In Light Availability?

They already are...here, and other places. Last I checked, Home Depot and Lowe's were not carrying them yet, but many of the speciality lighting stores do have them on the shelf.

These appear to be "flood lights", will any of these work in a living room shaded lamp?

Most of the designs I've seen look to be geared more toward recessed cans, but the globe bulbs here look to be suitable for a table lamp.

Thanks for the information. Using Steve's comment, I found a $17 globe one at infor@besthomeledlighting.com. $26 after shipping cost to Monterey Bay.

300K hours life, thats 34 years?

Well, I got my LED "globe style" light from besthomeledlighting.com and it's way too dim.

Maybe they will work for out-doors but not for a house lamp.

http://www.lc-led.com/ledlightbulbs.html

Pretty expensive though.

It appears to me that these are "flood lights", lights that can be put into a common end-table shaded lamp. Is that correct?

<....Pretty expensive though....>

Compared to the cost of NOT replacing the incandescent and incurring the continuing increases in utility charges, you mean?

If you are upgrading technology, why not change the lamp / mounting at the same time? The cost of the LED light source is going to be significant, lamps with conventional shades evolved to hide the glare of the tungsten lamp, the CFL was adapted so it was a plug-in /screw in replacement even to the physical shape so the spring clips on lampshades fit. LEDs work well as distributed lighting, let's stop trying to make them the same as a single source different technology, retro-compatibility is only so good for so long. Say so long to the old and welcome the new. Let's lay out our house wiring differently and incorporate intelligence and control.

There is a big market for both old and new styles.

You will have to forgive us old baby boomers, we like the old syle lamps, like the Asian designs.

And, there are a lot of us out there!

can a led run on AC?

in other words if you were to have two placed back to back, would each one light when the ac was flowing in that direction? and then the other when it's going the other way/

Then could you put enough in series to work directly from a 117 VAC power supply?

Joe

No- leds are a polarised device to run on dc, & then strictly current limited- sure you can use a cap as a drop device, but better & safer to just use dc- even a ac to dc plugpack of suitable voltage, with leds current limited, would do- to limit current use resistors in line with anode to get rated current(measured with dmm on current-eg white led- max current 25mA- use variable resistor to get 25mA- then measure vr & solder in a fixed res to nearest value. White leds require @ 4v dc.

Here's some more direct replacement screw in LED lamps. I saw an article recently about a newly developed ac powered LED but can't find the damn thing now, I'll re-post if I track it down.

Nigh....Great source! Sundance has some great LED Bulbs...I'm sure that in a few years they will be a lot less expensive!......Thanks, JohnR

LED will work in AC. Many string lights (x'mas lights) have nothing but enough LEDs in series to work in 120VAC. If you can see them blink, they're running AC.

LEDs are diodes with 0.7V drop. Like a diode, it'll turn off at the -ve part of the AC. A better and simple design is to add a full wave rectifier so the LEDs don't turn off. Most appliance with LED will just add a resistor and run the LED direct to AC. All you need to do is limit current to about 20mA with voltage higher then 0.7V.

Oh NO Mr Pineapple!!- ordinary diodes have 0.7v drop- Leds have 1.7(red) 2amber, 2.3 green, & 3.6v to 4.6v white leds. The only safe way to power a led from 120 or 240v ac is to use a plugpack- yes you can use a capacitor to drop ac to the led to say 20mA, but life of led is shortened, & any failure of cap due to surge etc will take out led. as to your suggestion that xmas light strings are leds- I think you will find that they are 12v globes- either in series, or parallel, powered by a plugpack transformer.
.

Hmmmmmmm........

How about a walk around a specialist lighting retail outlet, or even a major home improvement retail outlet as discovered in Yellow Pages?

http://www.diy.com/diy/jsp/bq/templates/content_lookup.jsp?content=/bq/stores/store_finder.jsp&emptyLeftNav=true&linktype=topnav_storefinder&noleftnav=true&ts=1205917099352&menu=storefinder

(usual disclaimer).

The "bulb" type, packed tube flouresent lights are far more effiecient with electricity per lumen delivered than the Multi-LEDs. So far there is no positive justification to use the leds except for safe Christmas tree lights, flashlights and, instrument lighting.

As I understand it, there is mercury in the flouresent type. Cleaning broken bulbs would create another health hazard.

There is a small amount of mercury & some phosphor which is also hazardous. In the UK you are not supposed to put spent fluorescent lamps in with ordinary waste.

Even IF you manage to blow one, you don't have that problem with LED's. So where is the advantage in CFLs again?

And the comment made earlier about no evidence for greater watt per Lumen efficiency flies in the face of several tests run by the US Energy Agency, which showed that indeed CFLs are better than incandescents, but that LEDs trump them both. And that is without taking into account the reduced heat load produced by LEDs, which, even when run at high outputs (what a high-output LED is for, after all), still generate far less heat per watt of input power than any other type of lighting currently available.

LEDs for me, that's for certain. I just have to convince my wife to like the colors that are available, AND the price.

Micah

Try: http://www.ledtronics.com/markets/25mm_med_index.htm

Mr. JohnR:

You can buy online at http://www.ledlightbulb.net/store/.

Mr. HandyMan

CHECK OUT THIS CO. LEDTRONICS IN TORRANCE, CA

our factory just producing this kind led T8 flourescent replacement tubes.you can check that at our company's website www.happywong.com ,or if you have any question you can ask me for detail:)