Actually a comparison test with four non-dimmable, “warm white” E14-LED-Fadenlampen in candle form it should be fit – to the advent season. Because but the led “Filament” technology especially for small base types has still its pitfalls, there to report unfortunately little celebratory: three candidates disqualified for the final round due to excessive Flicker.
For Good two years they are in almost every manufacturer and distributor range: high efficiency LED Retrofits with vertical “chip-on-board”- or “chip-on-cord”thread under airtight glass hoods, the optically the traditional “filament”- or Filament lamps to get as close as possible- and with relatively little ballast. That succeed often even quite decent, can go but very compact models or dimmable variations in the pants.
The problem: Small lamp socket E14 or G9 is much less room for helpful components as, for example, in the E27 socket. You need these parts but the generation of stable,flicker-free light in high quality. The most conventional retrofits have larger, opaque casing parts for electronics and cooling therefore at the bottom, while the LED chips and the light exit hood above according to less space.
Almost all components are hidden
LED-Fadenlampen should look like but as incandescent-like and are therefore mainly from a clear or Matt hood with refrigerant gas filling, where almost all offal be mounted except the led “Filament” hidden of course.
As the first of four randomly selected, non-dimmable test copies “made in China” in the price range between approximately 7 and 8 euro came a clear E14-LED-“Candle” by”LED’s change the world” (LCTW) with two light threads and 2 Watts nominal power with me. Pictures already showed that what is wrong here: several bold, horizontal”Shutter”strips continued through’s display and the pictures (below left). The control with the “Flicker Tester” app “Viso systems” from Denmark showed at my standard reference frequency of approx. 100 Hertz (calibrated) extremely high Flicker values (screenshot below right):
100 percent flicker rate and index 0.5 – much worse is not. LCTW Chief Hans-Georg Kucharski responded immediately with a drastic measure on demand:
“The filament candle and the filament drops show in fact a flicker rate unacceptable. After we had discussed with experts about the possible effects of flicker on the organism, we have decided to discontinue the sale of filament candle and drop of filament with immediate effect. …
The products will be blocked and returned to the supplier. Again, we will bring these types in the market, if we get tested by us and flicker-free filament candles and drops out of the development. Our customers are used by us to get quality products at very attractive prices. That will remain so. Our 40-W filament lamps E27- and 60-W equivalent are completely flicker-free.”
There were only three
A consistent decision you should suggest other providers. Because a few days later arrived the three other test candidates that my advertising partner “Grünspar” free provided me: A 7.49 euros, 3.5 Watt E14/B35 Velios strong lamp, the OSRAM “LED Retrofit classic B 25 clear filament” 2 Watt 7.39 EUR and Philips “Deco Classic” lamp “B35 filament E14” for 6.99 Euro. After the experience with the LCTW-“Candle”, the first test procedure was now the flicker-check with camera and “Flicker Tester”. And Lo and behold: the same bad result came about when two lights ‘ out.
Again, I informed the affected manufacturers last week immediately. The management of the Velios provider “Royal Beach toys & Sportartikel Vertriebs GmbH” in the Bavarian Kirchenanschöring wrote to me by return of post:
“Currently almost all LED are confronted filament provider with this subject. ” The main reason for the flicker effect is the lack of space in the E14 socket in which the complete equipment is installed. There are already technical ways, completely to eliminate the flicker effect, however under the premise that these products may be currently receive not the legally required marking and thus not brought into European trade.
To mention is that this effect for the majority of the people is in any way.Velios takes this matter very seriously and therefore also for quite some time under high pressure is working on a long-term solution of the flicker effect when the E14 lamps. If the customer with our product is not fully satisfied, he may exercise at any time guarantee our 5 year old Velios, that we give to all our products.”
The next “Velios” generation to be better
Can I also learned about the Velios-Marketing Manager Sebastian Badi, that the third generation of this led “Fadenlampen” (in the photo right theE14-“Candle” with four light threads) will be largely flicker-free and probably come in January 2016 in the trade.
Against the assertion that such lamps “not currently legally required marking may be obtained and thus not brought in the European trading” speaks the excellent result of the Philips lamphowever, which definitely has a CE mark and is of course also legally sold in the EU.
Similarly, by the way, probably as E14 LED bulbs by “SoftLED” (self-promotion: “100% flicker-free”), “VosLED” and”greenandco”, “Lichtpeter” or other blog readers positively assessed were, were selected but not to the current test – while apparently most other led “filament” candles on the market get a bad flicker measurements. As a conceptual advance as a technical step backwards can turn out to be.
What says OSRAM flicker/flashing
Update 11/30 /: A spokesman for OSRAM told me today:
“You’re right: also in our tests, we’ll get a result that some ‘Flickering’ people could perceive.” With the naked eye we can observe No ‘Flicker’.”
There is no corresponding binding technical standards, according to which so far no reliable test procedures that would be included in the approval processes for new lamp models existed. Meanwhile “worked on the improvement of the products with the affected parameter with high pressure” will however. Possibly, you leave earlier than planned on the market bring an improved successor. You could not name but still concrete data.
The “last of the Mohicans” comes from Philips
Only the 2.3-watt Philips remained therefore for the final round as the “last of the Mohicans” -“Candle” with two strands of lights and nominally 250 lumens for Just 7 euros left (top left the blister packaging, top right-activated lamp) – so sorry me it does: from the planned four comparison was a single test, because extreme flickering here lead to the disqualification. And since I do not have debates about, the percentage of people who perceive something in any way or interferes with should be as small.
Finally, it is so far poorly understood what impact can have light flickering or-Flimmern also subconsciously on mind and body. By various TV and video signals, one already knows cause severe seizures in photosensitive epilepsy may. And even if the health consequences were less dramatic: that can exclude someone completely up to date for strong flickering LED lights? Here at allpubliclibraries you can get more different lighting models. Certainly not, so we go a rather no unnecessary risk.
Power consumption almost exactly like factory specification
In my open, hanging test version launched the 15 grams light Philips lamp(right some data from the packaging back) without noticeable delay, remained completely silent and was warm maximum of 36 degrees after two hours of steady above at the hottest point of the base.
At this time the semi-professional “energy master” reported meter 2.4 Wattelectric power factor of 0.57 (in the Pro Lab there were 2.4 W and 0.60). At the numerous photo shoots, there was no annoying “Shutter” strips; You may therefore probably trust the very good “flicker tester” value.
There are vertical shadow depending on the angle of rotation
That were smuggling still vertical shadow in some pictures, is a multiple observed effectcaused by led “Filament” under clear glass covers. The less threads there are lit, the slightly heterogeneous radiation – is more pronounced depending on the viewing angle.Therefore, there are here for once two illuminated pictures with standing version:
Have you noticed the ugly Strip left alongside the hood? Okay, then we turn the version a little bit – so far that the two threads of light with approximately 120 degree beam angle are parallel-frontal view to the level of consideration:
This looks already much rounder and smoother – if may not be optimal because there are there is still a small dent in the beam upwards. The dispersion diagram from the Pro Lab of my cooperation partner “David communication” the “Butterfly” characteristics is also evident although the measured half-value angle of about 296 degrees suggests a pretty round radiation (Download pdf of the diagram).
The color of the light’s been a little yellow greenish
Subjectively a yellow-green stitch noticed the light color immediately – especially when compared to the two other, neutral-looking E14 Fadenlampen. My default color fidelity motif with a site and a deep blue motorcycle model in miniature against a white background makes it a little suspect (slightly brighter white balance “daylight”, due to low light intensity):
As usual at “warm white” LEDs approx. 2700 Kelvin the colors are color temperatureand nominal color rendering index RA 80, strongly to yellow orange moved. The rich red, nor the dark blue can sit really close to reality in scene; actually white paper could be also a urine test strips after use. What sounds so unappetizing that light is required but often just as “warm and comfortable”. Also striking: The partly doubled shadow silhouettes by the two threads of light.
More brightness than officially indicated
The result of the laboratory measurements was ambivalent: on the one hand there were nearly 280 lumens more flux than promised. the nominal color temperature was taken almost exactly with 2691 Kelvin.
On the other hand, the chromaticity coordinates of the Philips Fadenlampe is located after “CIE 1931” norm significantly above the ideal of “black body curve” with a tendency to yellow-green (graphic right, Pdf download of the entire measurement protocol), which speaks for a borderline color consistency.
Green content provides more lumens
The spectral diagram with the distribution of power in milliwatts per nanometre wavelength shows a gently sloping curve from the top at 610 nm (yellow-orange) up down to the small blue hillock links:
Here is in the green area significantly more going on than, for example, in the recently tested 7-watt LED-“Pear” by Philips, and Paper efficiency will benefit. Yet the E14-“Candle” can drive a better values in the color fidelity: the “General color rendering index” is located in RA 85.7. the particularly difficult supplementary reading for “Red saturated” (R9) achieved acceptable 23.2. So who has no problem with the appeal of color something to get used to needy, get a very decent quality of light by the Fadenlampe at least on the data sheet offered.
Efficiency measured by us sufficient best EU eco-label well 116 LM/w locker for’s A++ (graphic left); the brightness clearly exceeds traditional 25-watt light bulbs, the Stromsparpotenzial is thus around 90%.
Processing defects are not noticed – LED Fadenlampen from China is not a given. The nominal service life is average: at least 20,000 hours of lights and 15,000 cycles. Philips is unfortunately no guaranteethat goes beyond the statutory warranty on its light source. When other brands you can count on, however, with three or even Five years.
My test result:
The non dimmable, strong Philips-E14 – LED-“Candle” with “filament” technique is one of around 2.5 Watts with a proud price of 6,99 Euro not the cheapest, but among the few of its kind that have none of the common, coarse involved: buzzing, flickering, shoddy workmanship, to little brightness? Nil – all in the Green here. Green yellowish seems however also the light color, which could be deterrent despite the high”General color rendering index'” almost RA 86 to some buyers.
The radiation characteristics of the two “chip-on-board”-LED light strings is also getting used to because depending on the installation position, irritating vertical shadows in the light image can smuggle. Despite a measured half-value angle of almost 300 degrees, this lamp is not really homogeneous round brilliant. When installed in a lamp with frosted glass or plastic housing that level something itself after all, without the special, incandescent-like appearance of the LED strings would be completely lost.
To mix with the first in this late summer launched efforts of the number of one of the global lighting market, trend segment “LED-Fadenlampen” can be considered partly as a managed, has yet optimization potential. My strict LED rating scale awards so inspiring
two and a half stars.