LED Lamps – Color-Faithful Light For A Budget Price

The “GreenLight” were a real insider tip-LED lamps, it end August 2,99 Euro at “net Marken-discount” was. Namely, the Edeka subsidiary did not betray that the models of “Your” in Filderstadt superior light quality offer. As samples landed a dimmable E27-“Pear” officially 12 Watts / 1055 lumens and a not dimmable GU10 spot with 4 W/250 lm in the test program. Both were able to convince almost consistently.

LED Lamps - Color-Faithful Light For A Budget Price
Would you expect at the discount store for prices ranging from less than 3 to 6 euro to get LED bulbs with an “General color rendering index” of about RA 90, which are partly even dimmable? Okay – happens every now and again once something like Aldi Northand South. But in “net Marken-discount”? If is advertised in the brochure and the online product pages not at all with this superior color fidelity and the brand “GreenLight” (not to be confused with the same name LED shop in Lampertheim!) is still a good bit of the world fame?

Well – since some customers and I were surprised vigorously – in the positive sense. With a little help from the Web site of the “GreenLight” suppliers of your GmbH could I find at least a few days before the end of August 2016 action some performance data which allegedly matched to the “net” action lamps. On the Erstverkaufstag, two of the seven models as samples of my blog partner “David communication” first in the professional laboratory and then to me – with almost always convincing results went to safety.

The GU10 spot with solid light quality

The easiest method for measuring and testing was a 52 grams lighter “GreenLight EULED393-GU4W”-GU10 spotlights halogen spot-like glass design. Which is not dimmable, nominally has 4 Watts, 250 lumens, 2700 Kelvin, 36 degrees half value angle and RA > 90. The nominal lifetime is estimated with 25,000 light hours and over 100,000 switching cycles, the EU energy efficiency class A + (see package details below).
A country of origin is elegantly concealed (“made in…”), instead only the provider called “Your GmbH” in Filderstadt, Germany, where if the lamp not sure from a production line. In this price range is probably only an Asian manufacturer in question, not a Swabian.

In my hanging, open test version my gauge showed 4.1 Watts electrical power factor of 0.56, after two hours of continuous operation is largely covered with the results of the professional laboratory. At the hottest spot of housing at the base, the infrared thermometer at that time reported moderate 52 degree – below at the light outlet it was only good half.

Buzz? Hardly. Flicker? Nil!

After largely delay-free switching, the spotlights shone quite quietly and flicker-free. Awhirring was audible in quiet environment at a distance of no more than 5 cm; Index 0.0 and poor 2% excellent Flicker rate of 100 Hertz reference frequency – showed my”Flicker Tester” app ! The Professional measuring device “FM ch” supported this with a value of up to 17% at 48 kHz – in this frequency range for miles by the human perception away.

The dimensions (diameter 5 cm, 5.5 cm long) and the optical design based strongly on the usual 230 Volt halogen spotlights with part-transparent glass back, Central light source and multi-faceted reflector (MR16) with mirror film. Looks like from the top (left off, right):

There are some light backfire

A small part of the 288 lumens measured overall by the laboratory is emitted not only forward, but also backwards. This is a very nice impression yet not the same effect as with dichroic halogen “cold light mirror” lamps, which emit more light and a different color temperature in this direction, makes the “GreenLight” spot:

241 lumens are emitted according to laboratory measurement within the EU compliant design angle for accent lighting of 90 degrees forward – in my standard light effects that say “upwards”:

Here you can see several beam of different width and range – much like the halogen models. The half value angle as measured by the goniophotometer with just under 40 degrees (radiation diagram); This is very similar to halogen spotlights.

Colour rendering index above RA 90

Stay nor the actual colour temperature and colour fidelity (Pdf download of the entire measurement protocol): 2750 Kelvin and “General color rendering index” RA 92.9 – plus very good 64.7 for the most difficult Additional reading R9 (“red saturated”) and not quite as exhilarating 80.6 for “Blue saturated” (R12). Are glad that among these two shades in my default color fidelity motif with two model bikes against a white background represent prominent (“Daylight” without post-processing white balance) – can you even begin to assess the effect:

Here are no unpleasant color casts or confusing multi shade – this is all clearly delineated and shifted too much towards yellow-orange. The Red Duc can be recognized as such; at the blue Yamaha, this is not quite that simple, but still tolerable. There is overall a very decent spectral distribution – anyway, LED relationships. An “average consumer” is likely can’t tell the difference the light provided by the “GreenLight” ll2 hardly from a 35-Watt halogen spots of brightness, nor the appearance.

That so a clean processed, “warm white” light GU10 LED spot with a color rendering index of significantly over RA 90 for only Nearly 4 euros in ‘ net brand discounters has been sold -a hopeless! ” Go to a hardware store or a lamp shop. There, they get no more than The usual RA 80 led with some dubious light quality at this price level.

At the “GreenLight”EULED393-saving retrofit lamp, compared to a similar light 35 W Halo 88% power and have still barely waiver. Okay, the dimming is missing and the last ounce of fidelity (halogen lamps have RA 100 just like and are top especially in deep red objects).
You can expect to compensate for average three hours of light per day about 25 years, until the LED brightness to about 70% of the original value is degraded. For that jumbled up five enough LED rating scale of my strict, three and a half stars.

The compact E27/75 Watt-“Bulb” replacement

5,99 Euro cost the most expensive “GreenLight”-LED bulbs At the end of August at “Net”. This “high-end” flagship: A dimmable, officially 12 Watts strong, relatively compact and light E27-“Pear” with approximately 2700 Kelvin and over 1000 lumen luminous flux – bright enough, to replace traditional 75-watt incandescent.

84 grams weighs this LED Retrofit, consists of an aluminium housing and anopaque plastic cover, measures 11.2 cm in length and no more than 6 cm in width. It should fit for the most light.

Small shortcoming of this design compared to the trendy led “Fadenlampen”: the beam pattern is not truly round; weakens the luminous intensity in the direction of base. Officially, the half-value angle with 200 degrees is specified; the laboratory identified just under 184 (radiation diagram). My lights image also shows this asymmetry:

Here you get lots of light to above and to the sides, much less down – hanging installation is the reverse of course. With the base upwards my test candidates shine also for two hours with full load for the temperature and Watt measurements: here there was maximum of 92 degrees above and about 30 degrees at the bottom of the hood at the “GreenLight”. 12.8 W power consumption at an electrical power factor of 0.84 showed my “energy master”-amateur meter; There were 12.4 W and 0.85 in the laboratory. The official 12 Watt (see lamp imprint) has been exceeded so close.

Quiet on the desk and largely flicker-free

On a normal switch response time was after less than half a second the complete brightness visible and as good as anything listen – in quiet surroundings only a faint whirring in 5 cm distance. Flicker rate index 0.0 to 100 Hertz, reported the “Flicker tester” app “Viso systems” uncritical 8% the professional measuring instrument in the laboratory identified 12% – even in the green zone at the same frequency.

Typical of Dimmable LED lamps with stable light: after switching off, it takes about three seconds, until the LEDs completely empty have sucked the electricity from the buffer capacitors – during this period, the “pear” fades out. This is so no error, but intent and had a positive effect on my dimmer attempts.

Louder whirring at the phase control dimmers

Most evenly and breitbandigsten you work with an adjustable young phase control dimmers, where the overall performance (dimmer plus lamp) on dimmer all the way between 1.2 and 12 Watts was adjustable. This corresponds to approximately a flicker-free range between 5% and 95% of the maximum luminous flux. Two small downside: Dimmer and lamp developed a buzzing noise, which was strongest in middle position and was about 50 cm wide. Also flicker intensified something there: index 0.1 and 20% rate.

In very dark preset a turn / press dimmer you can expect also a longer response time when switching on. It can take around a second to the electrolytic capacitors are full, the internal electronics of the rule has evaluated the adjacent power and activates the LEDs flicker-free. Applies not only for these “GreenLight”, but for many dimmable LED lamps – to dimmers such as my not adjustable “be” model from the hardware store.
Although hardly a disturbing noise was there to hear this decreased the amount of rule 2.8 11.6 Watts up to (about 15 to 90% of maximum brightness) and hardly what changed in the upper third of the dimmer way. Still acceptable the flicker values: Between index 0.0 13% rate and 0.1 at 20% – probably also for very sensitive eyes. These data and the DIMM characteristic nothing improved also, when I try parallel turned a 40-watt light bulb, to exclude a possible minimum load problem.

Ratings were partly outbid in the laboratory

Completely without dimmer bondage was the “GreenLight”-retrofit in the Integrating sphere show what she has full power on it: at least 1135 lumens at 2657 Kelvin color temperature and a “General color rendering index” RA 91.4 (Pdf download of the test protocol). So far the requirements have been met sovereign (see package details above) – including the second EU eco-label A +.
With the additional color accuracy measured the E27-“Pear” lagged behind somewhat the GU10 spot: 58,2 for “Red saturated” (R9), 77.3 for “Blue saturated” (R12). At the appropriate standard for photographers that made but little difference:

The light appeared subjective a little yellowish solution, the Red of Ducati, the blue of the Yamaha and the white of the ground were colored something more towards Orange. And of course also the Hispanic was much softer and diffuser, because a translucent canopy throws just no accented light cone. That was earlier, when there were still frosted light bulbs, just so. Not that so please compare with clear glass power guzzlers.

The “GreenLight EULED393 12WBD” is – measured at their price (5.99 Euro at the discount store!)-an exceptional color fidelity, light, compact and well processed E27 LED retrofit. Compared to a similar 75-watt light bulb can save electricity about 84%, keeps allegedly 25 times as long, and lights similar to flicker arm.

She shares with many other LED lamps – from well-known brands, which are often much more expensive, but still not beautiful shine light restrictions on the viewing angle and dimming. Even in this ‘ GreenLight ‘ model I’m almost sure, that even stubborn light bulbs-friends in an Double blind trial (okay, as “blind” not quite fit) the LED light from the could distinguish the an equally bright, Matt filament bulb. What that means for my counting to five LED rating scale? You bought detect, scintillating light
four star.