Started the lighting giant Philips and OSRAM in the booming market for LED-thread or “Filament” with strong late-lamps. To compensate for the leader wanted to apparently boast a particularly high luminous efficiency. In the test of 6 watts of strong, non-dimmable E27 LED Fadenlampe from OSRAM, the laboratory actually identified an efficiency of almost 147 lumen/Watt – however with only average color rendering.
Almost at the same time there was the first “warm white” LED-
Fadenlampen models by OSRAM and Philips at the beginning of the new 2015/16 in the autumn with “Chip-on-cord” (CoC) technique – gradually supplemented by additional variants. Until January 2016, for example, which came strongest”Filament”- E27-retrofit from OSRAM on the market: A non-dimmable “60” in pear shape, “made in China” and with clear glass cover (pictured right, the view from the top with print).
“Sixes” without lottery
Here the paragraph 6 equal to several times a role plays: six strings of lights are in there, the lamp draws 6 Watts, the maximum diameter is 6 cm, to replace 60-watt incandescent and it is also currently sold for around $ 6. Okay, 10.5 cm total length and 31 grams of weight are not quite as compact and light as a traditional “bulb” luminaire housing should fit but easily in most.
The packaging is not very consumer friendly. After the blister is actually only still a case for the ton and can hardly be reused. The read tests of short-sighted people also opposed much of the data on the dark gray box in the back. In practice, they are hardly as good to read as my contrast-enhanced photo (left).
In addition to the light guide technology also the transition between the base and hood reminiscent of the design of the old power guzzler – with a distinctive solder joint for the ground connection:
Including the complete electronic ballast – is almost completely hidden the horizontal look. Because you have already at an angle from the top ‘ look to discover at least a morsel of offal:
No obvious flicker
After all, more space than in the smaller E14 variants where there are again problems with the stable treatment of the power supply is in an E27 screw base. This then results in disturbing Flicker valuesthat intrusive of particularly sensitive people as a lens.
The OSRAM “Pear” is likely to remain here but unobtrusive: the provisionally – to the early deployment of a professional solution – used “Flicker Tester” app”Viso systems” from Denmark registered soothing 4% rate at 0.0 index (relative to 100 Hertz, see screenshot right).
Hardly any heat
My guess: Danes don’t – lie anyway, not for that unique values, especially since my camera display also showed no flicker or “rolling shutter” strips. After the two-hour warming in my open, hanging test version of ELV-“Energy Master”, 6.1 Watts power consumption with a work factor of 0.54, the infrared thermometer registered maximum 39 degrees in the Hottest base spot and my ears with absolutely silent environment a quiet whirring up approx. 5 cm in distance – so everything in the green zone.
The switch-off delay is little more than a quarter of a second and joins in the League of the very responsive and mostly non-dimmable LED retrofits. Dimmable lamps take the often much longer.
The light cone
The viewing angle is what to expect from six vertical, conical parallel threads under clear Hood: not really around and not very homogeneous, because the individual beams do not completely overlap, but are separated from each other by light shading:
There’s the dents usual for such types of lamp above and below, resulting in (Download pdf) included eight (“hyper-cardioid”) and a half value angle of 295 degrees on the dispersion diagram one. Matt hood that looks considerably more smoothly – but at the expense of efficiency. The new “frosted” sister model needs therefore 8 watts for the same brightness.
10% more lumens than promised
The light output of the clear version is amazing 895 lumen (pdf Download of the entire measurement Protocol)according toIntegrating spheremeasurement my sturmerprobten blog-cooperation partners “David communication”. That means a 10 percent exceeded of the heck, a legendary efficiency of approximately 147 lm/W and catapulted far into the OSRAM LED Fadenlampe in the best EU eco-label A++ (see box cutout on the left).
This is all the more remarkable because the color temperaturewith 2543 Kelvin a whole piece is “warmer” than the official 2700 K. Light quality, you must make concessions, however. At least RA 80 would at the ‘ General color rendering index ‘ ‘ come out, almost RA 83 were it in the laboratory – but with below-average values for the default color of “Lilac violet” (56.7 = R8) as well as for the additional measurement colors “Red saturated” (R9 = 8.9) and “Saturated blue” (R12 = 78.8).
Light impression could not inspire me
Unfortunately (nee – in fact intentionally!) the last two colors play main roles in my default color fidelity motif with two model bikes against a white background (white balance “Daylight”, without post processing). And there you see maybe what struck me on the subjective impression of the light spontaneously:
The red shift is by far not as strong as one would expect at this “warm” colour temperature of an incandescent lamp. Instead, a yellow green stitch in the otherwise relatively neutral figure; mingles with the OSRAM LED Fadenlampe particularly noticeable with the site Ducati and the really white area. A clear indication of a slightdeviation of the color location from the best “black body curve”. After all, the shadow drawing is very precisely and without disturbing multi silhouettes.
It’s just a quirk of the luminous flux measurementused by LED producers like and again, that she rewarded the higher sensitivity of the human eye for the green-yellow area with so much lumen. Here we go again the classic trade-off between nominal efficiency (I consider to be over-valued) and high light quality (would be more important to me).
My test result
This roughly 6 euro and 6.1 Watts strong OSRAM LED Fadenlampe shines so bright that you can – replace it an enormous Stromsparpotenzial of approximately 92 percent or even traditional 75-watt incandescent with their six “filament” and approximately 895 lumens! They buy that are however missing dimming and sub-optimum lighting quality with a very special radiation characteristics.
Which is good: flickering far less than a light bulb, has a very similar color temperature, sees off almost exactly so, is quiet, very responsive, light and relatively compact.
Who attaches more importance to sheer brightness and efficiency than on the location of the place of color, is served by OSRAM with a quite acceptable E27 retrofit solution, which brings two years (Pdf-download of the official data sheet)warranty and a nominal service life of 15,000 hours of light, as well as above-average 100,000 switching cycles. For my strict LED rating scale assigns half of its maximum yield – these are two and a half stars.