The LED bulb, new flagship product in Japan

[Obamot]

I am not a big specialist in LEDs but I bought some recently.

conclusions:
Small 18 LED spotlights of 1W => phenomenal lighting quality compared to incandescent or compact fluorescent lamps. But conentrated lighting area.

60 LEDs panel 3W => always the same quality of lighting with much better than 3X more intensity than the 1W spotlights (larger LEDs) but relatively directional lighting anyway.

In the current state, I hardly see how or could replace the compact fluorescent lamps by LEDs for the large areas to be lit, because on the one hand to arrive at the same surface it would be necessary to consume much more energy for an equivalent cover in lighting LEDs (since we find fluorescent lights at 11w ...). By cons for spot lighting, the LED is tip-top.

Fortunately, with very large-scale production and improved performance, new, even more efficient LEDs will no doubt emerge. At the same time, new “organic” lighting technologies that are even more economical will be introduced, which can be integrated into any glass surface and give various lighting colors. This is probably what will replace the compact fluorescent lamps for large surfaces to be lit for the next generation ...

[I Citro]

Of course yes...
We now know how to make LED lighting suitable for light and angle of view.

The problem comes from the fact that we persist in wanting to integrate this technology into the standards of incandescent technology.

It's a huge waste of performance, raw materials ...

You have to start from a blank sheet, use new standards smarter than traditional screw or bayonet sockets.

It should be used to make more compact, flatter light sources allowing the creation of new luminaires.

The low consumption of these lights also makes it possible to reduce the cross-section of the conductors and further save material.

Regarding the current price of these products, we are still in a period of launching this technology. This clearly means that we are not selling these products at their ex-factory value plus the "standard" margin but are overpricing and offering the items at the maximum prices that consumers are willing to put in.


So put these bulbs on a scale and calculate the price per kg ...
Do the same calculation with, for example, a microwave oven sold for less than € 75 in France ... And don't tell me that the microwave uses cheaper raw materials per kg ...

[Christophe]

+1 Citro, except flat:

We now know how to make LED lighting suitable for light and angle of view.

Yes but not in "classic" multileds (X white LEDs of 0.06Watts per unit) ... which since 2006 have been denounced on these forums!!

There are still too many of these crappy things on the market!

[Woodcutter]

A little less than 75 euros is that what democracy calls you? [...]

He says it's "half of 75 €", the article ...

Do you have bulky LED Megaman bulbs? I'm interested, no matter the price.

[Obamot]

We now know how to make LED lighting suitable for light and angle of view.

Yes okay, except that those, I can't afford them.

And unfortunately, clients like bibi, cannot afford to compare ....

In any case Christophe is right. Inexpensive LEDs are coming everywhere and even to hard-sellers. It is still a serious warning of an invasion of the market on an even larger scale.

I think that in a year, the prices of the "expensive" will drop by half (beware of the store's stocks ...)

[I Citro]

+1 Citro, except flat:

We now know how to make LED lighting suitable for light and angle of view.

Yes but not in "classic" multileds (X white LEDs of 0.06Watts per unit) ... which since 2006 have been denounced on these forums!!

There are still too many of these crappy things on the market!

Admittedly there are still many pigs on the market but For certain applications this is sometimes very well suited.

La 48LED card that I installed in my wc is very suitable for this use. The lighting is sufficient for a small room with white or very light walls, the ignition is instantaneous, the correct light quality or even superior to many CFLs.

[Christophe]

Do you have bulky LED Megaman bulbs? I'm interested, no matter the price.

Are you serious? Here is the range of megaman led bulb: https://www.econologie.info/share/partag ... 7oKjUd.pdf

Public price including tax: 80 euros for the 7W to 140 euros for the 15W according to the .pdf !!! Frankly ... does that really tell you?

Still, at this price, it must illuminate well (7 to 15W of led power is not bad) but it is 24 to 35 ° angle !!! It's weak ... but I would have to test occasionally anyway (for "Science" and for the education of forum ) but good without any illusions ...

[Obamot]

There are still too many of these crappy things on the market!

Good evening Citro,

Could you publish your assembly diagram, I'm interested!

What happens if an LED breaks? Can the overvoltage catch others (does the circuit go out because they are in series?). Thanks in advance.

RTDC.

PS: I have to fix one and I would like to know what to expect ...

[Christophe]

Well, there is no real circuit: he used "discount" led bulbs that he took apart ... and wired without a base.

I do not know if it supplies everything with 12V directly or 230V having kept the internal transformer.

[Obamot]

Well yes but if it is powered by 12V (I suppose it is continuous crnt) what is the tolerance of the LEDs (+/- in volts what does it give?) And how many mAh it takes per LED? Can a fuse be used to protect against overvoltages and how should it be calculated?


Note: ("gling" welcome to the 1st basement, electronic department for dummies ... I know... )