Fluo-compacts test on "Que Choisir"

[Christophe]

A) Well, don't get angry for so little.

I think it’s mostly dedeleco that it is necessary to moderate (it's been a few weeks that some complain about your behavior) ... because you aggravate more than one ... so you know what you have to do ...

You already stop the systematic fat in all your messages and you immediately stop your almost systematic "contempt" ......

Otherwise I will get angry ... but I don't like to get angry ...

Message copied in MP to the interested party.

B) Otherwise, Bird, yes on a single light point, the 23 or even 30W fluorescent (examples: economic and LED bulbs ) are, today, better than leds. This is what we use at home .... but, as you say, with the oled in 5 to 10 years I think it will change!

However, you cannot say generalize by saying that LEDs are disgusting because for corridor or WC spots, for example, the fluorescent lights, because of the heating time, are not very suitable ...

[bernardd]

I don't understand the question ...
Ask the question to dedeleco, he must have a model in mind.

If I can rephrase the question this morning: do you know the electrical assemblies inside the bulbs? For example for this one?

https://www.econologie.com/shop/ampoules-led-c-90

With 60 leds, and current rectified to 180V, that would make 180V / 60 = 3V by LED if they were in series, which is not silly in my view, knowing that I do not know the working voltage of these leds .

Perhaps the very good energy efficiency of these bulbs comes precisely from the fact that the LEDs are there in series? ie without loss of transformer / chopper?

[bernardd]

To supply 220V directly (possibly rectified), more than 100 LEDs would be required in series, not

From the 230V AC rectified, one must arrive not far from 180V, except error.

And the shop shows this famous bulb with 60 LEDs, which has the best efficiency measured by Christophe (80lm / w).

Or 3V by LEDs ... so serial connection possible, to be validated: by the manufacturer? By sacrificing a light bulb? validation will take a long time if we wait for her to die of natural causes ;-)

[oby]

Hello,

one method of drastically reducing the voltage is to use a zener, you can directly reduce the voltage so that it can be used by the leds.

[Gaston]

From the 230V AC rectified, one must arrive not far from 180V, except error.

It is 230V effective, so 325V amplitude.
Once straightened and filtered, we are more than 320V

one method of drastically reducing the voltage is to use a zener, you can directly reduce the voltage so that it can be used by the leds.

And dissipate all the extra power in the zener as heat

[Macro]

It zener losses all that

[Christophe]

If I can rephrase the question this morning: do you know the electrical assemblies inside the bulbs? For example for this one?

On this specific model no, we have had no after-sales service yet, so have not had the opportunity to open one ...

By cons I opened others: there are X (3 often) circuits in parrellele but the voltages on each circuit depend on the type and number of leds obviously.

I can, on the other hand, try to remove the glass to measure the voltage across the LEDs / circuits ... but we are very NOT ABOUT this subject ...

[oby]

Hello,

in this case a switching power supply ...

[bernardd]

I can, on the other hand, try to remove the glass to measure the voltage across the LEDs / circuits ... but we are very NOT ABOUT this subject ...

I do not find: the zero level of the product test, it is already to know what we buy in it ... a serialization or a switching power supply, it is not the same reliability, nor the same losses, nor the same electromagnetic pollution.

[Christophe]

Yes ... except that this subject is not about LEDs but compact fluorescent ...