Test Comparison Bulbs Led Luxeon - Compact fluorescent MM

[Christophe]

a pity that there are none for 12V LEDs

Uh? Isn't that what you're looking for by chance? https://www.econologie.com/shop/douille- ... p-226.html

To use with: https://www.econologie.com/shop/alimenta ... p-227.html

ps: yes the leds have been around for "always" in E14 or E27 screw caps but given that the led bulbs are still strongly directive, led use with these 2 bases (especially the E27) can be a big disappointment since it is the spot that are, for the moment, the privileged ground of the leds. In this case, the MR16 and GU10 are perfect ...

[Corpse Grinder 666]

indeed the bases have been around for a while, but it is true that they were not found "everywhere".

Christophe the fattening at a yield of how much (because from what is noted it is of high quality)?

for the base I was talking about LEDS at 12V in GU10 base, while the link you gave is for MR16 (the tips);)

[Patatrace]

These LEDs are already operating at 12V, the 230V -> 12V converter is integrated into the bulb, the principle of bulbs operating in GU10.

As I said it allows to use a good quality bulb with low-end fixtures since they only carry current without lowering the conversion efficiency which, if the bulb is of good quality, is already very Well. This therefore fully justifies the high price of the bulb.

[Christophe]

indeed the bases have been around for a while, but it is true that they were not found "everywhere".

Christophe the fattening at a yield of how much (because from what is noted it is of high quality)?

74% is marked on: https://www.econologie.com/shop/alimenta ... p-227.html

Gloable yield or efficiency: 74%

for the base I was talking about LEDS at 12V in GU10 base, while the link you gave is for MR16 (the tips);)

In gu10 is that 230V actually ... so you will not find a bulb in 12V GU10 I think, but NOTHING prevents you from replacing the culos by an MR16.

By cons you can find 12V bulbs in E27 or E12 but very limited choice (we have a 12V DC 15W megaman fluorescent: https://www.econologie.com/shop/ampoule- ... p-121.html ).

Conversely in 12V MR16 there is no fluorescent bulb (yet?), So only LEDs are an "eco-friendly" alternative to halogens ...

ps: not patatrace, the leds do not work in 12V directly, even in the bulb MR16 you have a transformer ...

According to wiki: http://fr.wikipedia.org/wiki/Luxeon a Luxeon III led of 3W consumes either 0.7 or 1A which corresponds to voltages at the terminals of the led 4.28 or 3V!

[Christophe]

Here are the characteristics of a 3W cold white power led:

Specifications

* color: pure white
* luminous flux: 120lm
* dominant wavelength: 625nm
* color temperature: 6000K
* angle of view: 90 °
* thermal resistance: 48 ° C / W
* direct current / voltage: 1A / 3.2V
* power consumption: 4W

[Patatrace]

At the time for me, I did not know that they operated at an even lower voltage than 12v. Thanks for the precision.

I notice that 120lm for 4w makes a terrible output of 30lm per w, compared to 65lm per watt of Megaman, I thought that the LEDs had a yield x2 so it should give at least 360lm for this led. Weird ...

[Corpse Grinder 666]

I was interested in the GU10 base because I find it easier to set up and can be more sturdy than the MR16;)

[Christophe]

I have just redone a measurement series to confirm (or invalidate) the first series.

I took different measurement points and I shot the spots.

The results are rather consistent with the 1st series (there are always incomprehensible "peaks" and "troughs" :



I did some averages and divisions by taking as reference (index 100) the compact fluorescents and by supposing that the powers indicated are the real powers consumed (I would check that later):



Conclusion:

It appears that the best light output (lux) / consumption (watt) is, by far, that of 1 W LEDs.

Thus, the 3 Luxeon 1W bulbs have an energy efficiency (Lux / Watt) 3,69 times greater than Megaman compact fluorescent lamps and the 3W Luxeons bulbs 2,09 times greater efficiency. Provided that the 1W and 3W are the actual consumption (very likely).

It's funny because with compact fluorescents it's the opposite: the more powerful the compact fluorescent, the better its Lux / Watt performance. At least that's what we saw during the measurements in 2006: https://www.econologie.com/forums/ampoules-f ... t2124.html

[Christophe]

I notice that 120lm for 4w makes a terrible output of 30lm per w, compared to 65lm per watt of Megaman, I thought that the LEDs had a yield x2 so it should give at least 360lm for this led. Weird ...

Good remark ... especially since there is no transformer!

I would have an explanation: Velleman's notices (where this Led comes from) are often "not very precise", do you rather in your "eyes" and my last measurements.

Now I would have to measure the actual consumption of these Luxeon bulbs!

[Fovenava]

Very interesting comparison, thank you!

With regard to the tested LED bulbs, I remain skeptical of the fact that they are highly directive.

For a pose on a wall lamp for the development of an object for example, I think it's an interesting solution.
But for the installation on a spot recessed in ceiling at 2,5m from the ground, we will get a task on the ground ...

By cons I am pleasantly surprised that we get a temperature of 2700 ° K