Low Conso Bulbs and Led Bulbs

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oiseautempete
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by oiseautempete » 20/12/09, 15:44

bernardd wrote:But it was already neon lamps low consumption ... the LEDs are better also because they are directly in low DC voltage, so we save the high voltage stage and flicker ...



No conventional LCD tubes consume + 260w for the same brightness (always for 117cm) or ~ 60% more ...
There is no flicker in LCD, just the afterglow which causes blurring during tracking shots and rapid movements, which is offset with 200hz scan and even a plasma 400hz Neo PDP ...
but this has nothing to do with the backlighting ...
The low voltage (less than 230v) causes a loss of energy because of the transformations ... the high voltage also obviously ...
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by bernardd » 20/12/09, 16:05

oiseautempete wrote:No conventional LCD tubes


LCD tubes? Do not know, it was neon tubes ...

explained here: http://www.01net.com/editorial/355467/les-ecrans-lcd-boostes-par-larrivee-des-led/

oiseautempete wrote:There is no flicker in an LCD,


I was not talking about the LCD but the neon backlight compared to the LED backlight.

A neon always has a flicker, because the anode and the cathode are constantly reversed. For a neon lighting, it is 100Hz and it is perceived ...

oiseautempete wrote:The low voltage (less than 230v) causes a loss of energy because of the transformations ... the high voltage also obviously ...


A neon asks between 500V and 1000V or more: http://www.pavouk.org/hw/lamp/en_index.html
There is loss therefore heat, excessive weight and bad reliability.

The LEDs operate between 1V and 5V, so at the same voltage as the rest of the LCD control electronics: no need for additional circuits and better performance ...
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by Did67 » 20/12/09, 17:14

Do not be angry: one speaks "TV", the other "lighting" ...

PS: oiseautempete: the subject is "Low Consumption Bulb and LED Bulbs" ... Who says "bulbs", says lighting ...
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by Did67 » 20/12/09, 17:22

fthanron wrote:
Instant and powerful lighting.

...


Finally, yes, but 13 W. So as much as a beautiful compact fluorescent ...

At the same power consumed, you had a flucompacte ball, for ten euros and I do not know me, 1 300 lumen ...

So you paid dearly, you do not save anything and I doubt (but it is to be verified) that you have the same light intensity ...

PS: I have nothing against LEDs, I myself have about twenty spots + ten bulbs where I don't need power ... In the case of unique "luminaires" ( like "lamp in the middle of the room"), I was not convinced, on the contrary ... There, I remain in compact fluorescent (apart from the toilets, I no longer have filament bulbs).
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by fthanron » 20/12/09, 17:35

You're right Did67, for 13 W LED, the manufacturer announces 1075 lm, 50 Kh lifetime.

In main lighting for a kitchen such as ours (about 9m ²) this is quite acceptable (validated by the mistress of the house).

As for the cost, my investment is an investment with all that it entails.

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by Did67 » 20/12/09, 17:48

fthanron wrote:
lifetime 50 Kh.



See what I wrote above (about a dozen LED bulbs, a dead after 2 or 3 months only): this is the question.
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by RV45 » 20/12/09, 18:07

Hi,

I went to the Led with a lot of success already I did not have a bad surprise as on low energy consumption bulbs that do not take in time.

I also found spot 10 and 7 W very powerful LEDs as well as spots 3,5 and 5w:

you can look at examples on this sequel:
http://www.chaleurterre.com/forum/viewt ... ght=#92940
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by fthanron » 20/12/09, 18:19

Maybe the Central region is a good place to use LED bulbs ... a kind of spatio-LEDian continuum? O)

Thank you for your warning Did67, the one I am talking about is guaranteed 2 years manufacturer, so at worst if it slams within two months ... it is now 4 months it is in place, what luck; o)

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by bernardd » 20/12/09, 18:51

[quote = "Did67"] Do not be angry: one speaks "TV", the other "lighting" ...

I did not get cold, I explained, because I had left too much implicit. I was talking about lighting initially, saying that the lighting diodes would benefit from the scale effect of producing the LEDs behind the LCDs.

Otherwise, diode reliability problems may come from too high temperature, and also from the 230CAC-> 1-5VDC conversion stage depending on the type and assembly.

As I said on another post, it will be necessary to think of putting 12V directly on the network of a house, with a star network from the power supply. One could imagine the injection of the 230V only after a negotiation to be defined with the devices requiring more power ...

It would be more economical on standby and in the number of 230V-> 12VDC converters for 3w each time .... and less dangerous with empty sockets.
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by oiseautempete » 20/12/09, 20:02

bernardd wrote:
oiseautempete wrote:No conventional LCD tubes


LCD tubes? Do not know, it was neon tubes ...

A neon always has a flicker, because the anode and the cathode are constantly reversed. For a neon lighting, it is 100Hz and it is perceived ...



A neon asks between 500V and 1000V or more: http://www.pavouk.org/hw/lamp/en_index.html
There is loss therefore heat, excessive weight and bad reliability.

The LEDs operate between 1V and 5V, so at the same voltage as the rest of the LCD control electronics: no need for additional circuits and better performance ...


You like to cut the hair in 4 it looks like ... missed because neon is a misnomer because there is no neon in the standard tubes (the color of a real neon tube is red orange) ... j I wrote LCD tubes to make the distinction, without more ...
You must not be familiar with the fluorescent tubes: in my box were ramps over fluorescent tubes and linear 1200m I assure you that these tubes running h24 / 365j per year are phenomenal reliability (time life 5 years and more) and excellent performance ...
The famous flickering of the tubes is imperceptible when there are several ...
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