The manufacturer must publish a nominal lifetime for their LED bulbs – lighting hours and cycles. How can you know so well, and we customers must rely on this information?
10, 15, 25 years or even longer lifetime promise LED providers for their lamps and luminaries. Many models that may well be, but you can’t really know. Finally LED lighting is used in the budget until more than five years to any significant extent. In addition, this information refers not on continuous operation, but only an average of 2.7 hours activity per day.
Therefore, “Lamp hours” are under other projected on the packaging and data sheets.Which might man – share basis by the average “Standard usage” – by 1000 and then had the approximate life in years. But in reality this is not so easy. The manufacturers have not only 25,000 hours continuous illumination their new lamps before they release the items to us. So a test run would take almost three years; until then, there would be at least six improved successors and the lamp would be completely out of date.
6000 hours must meet the most
Most of the providers and professional testers such as the Austrian Energy Agency or”Stiftung Warentest” leave it therefore at more than 6000 hours and regular intermediate measurements, to draw conclusions on the remaining capacity of 25,000 hours. The DIN setting specification for LED modules has been: at the end of the endurance test must at least 50% of copies of a series still ≥ 70% of the initial luminous flux as (“L70B50” is called his). A uniform EU control/measuring method for determining the rated life of LED lamps still didn’t exist until September 2013.
As of March this year, the EU Ökodesignverordnung prescribes that at least 90% of the copies of an LED light source model must survive 6,000 lighting hours and deliver then at least 80% of the original brightness. All other provisions – about the turning resistance (≥ 15,000 cycles, if the LED – life time is ≥ 30 000 hours, otherwise at least half of the lamp hours) and the early failure rate (maximum 5% after 1000 hours) – stay on the edge of the previous September. Actual compliance is verified by the respective country authorities after a EU uniform set sampling method.
After the LED rated life it is not duster
So on the packaging of a reputable manufacturer what of “life: 15,000 hours of light” is available, does not mean that that the light from the 15.001. hour remains completely dark. She has lost only a part of their specified luminous flux value. A 806 – lumen-“Pear” is you can – make happy probably with at least 600 lumens nothing to the throwing away.
Switching cycles and lighting hours ratings on packs of different LED lights – each manufacturer has its own symbolism.
However, already the durability testing is limited to 6000 hours will cost about eight months. Quicker with severe test conditions that simulate a prolonged use. For example, the Austrian company LEDON Well three-week “hate tests” makes (for “highly accelerated stress screening”).
While technicians according to the corporate expose constantly the bulb extreme, ever-changing external conditions at relatively short intervals. These included jumps in temperature between + 80 and -25 ° C and again back within 10 minutes. In the high temperature phase, the lamp will also again and again on and off.
In addition, there is a moisture test, where the LED lights over a longer period would have to endure a relative humidity of 85 percent in 85 degree heat. The light-emitting diodes themselves usually loosely put away such “hate” stress; all about around but isstrongly encouraged: solder joints, adhesives, silicone coatings, electronic ballast housing material.
LED lamps with “Thermostat”
In various new brand LED lamp models (about spots by OSRAM and LEDON) thus works a heat protection circuit that down regulates the power output from a certain temperature or cut. After a cool-down phase, there is again automatically full power. Very nice test I can do this with my Twin spotlights in the recording studio, where the GU10 LED spots light downwards and the heat radiate upward into the tight, closed housing. There’s almost no air exchange for cooling. This is the “worst case scenario”for the lamps and so ‘ ne kind of “hate test”.
Extreme conditions for my LED test spots: close housing without ventilation slots above.
Better living conditions probably have the individual lamps, which are tested by LEDON for three years in continuous operation. They should have completed according to Company info more than 25,000 hours and show still no signs of fatigue.
Actually, not the LED chips anyway are the weak points of a light bulb. You can create over 50,000 hours of continuous operation. Helps but nothing about the capacitors, transformers and rectifiers in the driver make long before flabby.
Although the manufacturer probably not create it, that your lights work only a certain time– hardly enough to determine. However, you must keep the material purchasing costs in check, or suffers profit margins – especially at steadily declining prices.
Many shifting may harm
There, some company touts as a precaution rather conservative lighting hours and Cycles figuresdo not fall under the suspicion of fraud. For many on / off circuits can shorten the life of the lamps electronic, regardless of the hours of operation.
Therefore, it may happen that only each briefly, but commonly used bulbs in stairwells or hallways before reaching their rated life of give up the ghost. Consumer advocates advise household lighting can be expected on average at least 10 switching cycles every day.
Top models keep out loose over 100,000 cycles
OSRAM will, for example, in its data sheets one and testing phases turn off from each 30 seconds of (so a minute for a full cycle), can do so within 70 days from the 100,000 cycles and guarantee them (or more) for many of its models – without extrapolation or extrapolation.
This can be pretty no matter the LEDs themselves. Modern chips put away billions of cycles unimpressed. They also need if they are around with Schaltregern in the lamp “pulsed”. The electronics alone are affected by premature aging. The failure distribution also known by other electrical equipment is for LED lamps after the “bathtub curve”(graphic: Wyatt, McSush, El Grafo @ Wikimedia Commons, license: Public Domain):
In the first time the erroneous “Monday copies”; adopt so quickly and at a relatively high rate all other lamps have a long time with a few cases out afterwards, and only much later, the failure rate rises age again.
So packed inside a Dimmable OSRAM LED spotpresents itself: electronic components until you drop – and this is only the top of the Board.
At super cheap LED light sources from dubious sources of far East you need to incidentally do not exactly know what is meant by the Pack information. This “China firecracker” are namely among others so so extremely cheap because the manufacturers of decent material and extensive tests, but write like diced dream values on it, which – depending on the mood of the customers – for fits of laughter or cry cramps make. If such a Wonderland perseveres even no eye cancer caused and also for years, then it is pure coincidence.
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