Double Test: New Philips PL-C-LED Tubes

They’re often especially in recessed downlights, ceiling and wall lamps: compact fluorescent lamps with a short tubular shape, G24 socket and 18 or 26 watts.Philips has eight low-power alternatives in the program for now. The “CorePro PL-C” – LED tubes with polycarbonate casing, hinged end caps and between 6 and 9 Watts of power consumption are however not anywhere easily and offer only average quality of light – at least if you believe the laboratory values.
So gradually the big names of the light market with its LED-Retrofitcover all traditional lamp base variations from – first-Sortimenten’s were mainly those used in homes en masse (E27, E14, GU10 and GU5. 3, etc.), then the rather widespread in commercial and public areas (T8, T5, R7s, etc.). Now a Group as a “milestone” comes to Philips series with G24 Sockets: the “CorePro PL-C”-LED tubes with approximately 14 or 17 cm in length, approximately 77 or 92 grams weight and uniform 3.3 cm diameter.
The first eight models are not dimmable and should be a power-saving substitute for 18 or 26 watts strong fluorescent lamps such as the Philips “Master PL-C”, which are, for example, very numerous in downlights of offices, hotels, Conference -, to find washing and waiting rooms or staircases and corridors. Four variants have two pins (G24d) for KVG/VVG- and four pin (G24q) for compatible electronic ballastlighting fixtures and cost from around 11 to 13 Euro.

Long service life, strange light color names

Depending on the model and color temperature (3000 or 4000 Kelvin) they offer 600, 650, 900 or 950 lumens. The nominal lifetime of at least 30,000 hours of lighting and 50,000 switching cycles and three-year warranty for all the half-value angle of 120 degrees, the nominal color rendering index RA 80, is identical.
Vicariously I not really helpful got a KVG/VVG suitable lamp 8.5 W with “warm white” light color from the palette as well as selected – the English Philips “white light” designations for 3000 K and “cool white light” for 4000 K I find an electronic ballast version 6.5 W with “white” color temperature to the test.

The quiet, efficient light workhorse

16 SMD led lights up at the well 8 watt of powerful Philips “CorePro PL-C 2 p” – LED tubes under the matte plastic cover – with a total of 900 lumens, around 3000 Kelvin and RA > 80.
Admit – there are no really round LED tubes at stake but rather rods with square cross-section and rounded corners. They are built in China quite durable, white or transparent plastic.
Search any gimmicks such as Dimmability, excellent color fidelity or even flexible colour temperatures, at the “CorePro PL-C”-LED tube by Philips in vain. The parts have mainly a job: light as simple replacement of compact fluorescent lamps – without noticeable delay, without annoying Flackerei as bright, unobtrusive, silent and durable. Only one ‘Luxury’: The rotating hood, with which you can adjust the beam direction approximately 35 degrees left and right.
This means for the G24d models: old tube ‘ out of the KVG/VVG- light, LED tube ‘ in – ready. You need only the ordinary household power with 230 Volt alternating voltage, no special high-frequency supply like the ECG suitable G24q versions. By a “starter-dummy” to replace or a prohibition of installation in tandem lights, as it is usually necessary when the longer T8 and T5 LED tubes, is here, no question.

No buzz, no sudden darkness

In my open test assembly without ballast – direct to the network – launched the “CorePro PL-C” with less than a half-second delay, remained completely still and moved two hours endurance 8.3 watt electric power factor of 0.93 (laboratory values: 8.2 W, factor of 0.94). At the hottest Housing Authority, there was moderate 56 degrees at this time.In a partly closed luminaire of course considerably more can be – I would keep but even 80 degrees for non-critical. Dim the LEDs about two seconds after switching off – there obviously a decent capacitor in the Vorschaltlektronik.
“Flicker tester” app “Viso systems” reported to the reference frequency 100 Hertz a flicker index by 0.1 at a 31 percent rate; my camera screen showed only a very faint flicker. The measurement with the Professional device for my partners “David communication” showed maximum flicker account for 34% at 2 kHz. The interpretation of these values is difficult, because there are no standards or scientifically unique requirements for the probability of perception and consequences of such high-frequency fluctuations of light. Say Let’s so: flicker-less is this LED lamp sure not bad but also not really.

The light is not really “warm white”

Subjectively had the light on me something “cool” / bluish than the specified 3000 Kelvin. Provided sober and functional applications, this is not a disadvantage – bedroom nobody thought “warm and homelike” lit for it here anyway. The laboratory data (Pdf-download of the test protocol) support however this impression not: 2967 Kelvin correspond pretty much the default (see lamp imprint on the bottom); There are even approximately 933 lumens instead of 900.
Maybe you can understand begin with my default color fidelity motif, what I mean. The two mini-mopeds against a white background are relatively neutral pictured – without excessive yellow orange drift (white balance daylight, without post processing). The drop shadow is slightly diffuse; but real multi shade through the 16 LEDs are not visible:
That the rich red of the Ducati not really convincing ‘ come may, it becomes clear when looking at the colour reproduction values: while the General index RA is 81.8. the value for the additional measuring color “saturated red” (R9) but only in 2.7. This is in comparison to other RA > 80 LED lamps very weak. The spectral diagram clearly shows the ratios:
The “color peak” at 605 nm wavelength and color dominates (approximately 582 nm) are very far from the Red spectral range, the amount of blue links is significant and the quickly falling off to the right direction of power far exceeds deep red. Excellent color fidelity you may not here so expect and hence no recommendation for cosmetic or culinary demanding applications (vanity mirrors, dining table etc.).
As with the dispersion of the ‘PL-C”-looks LED tubes, was unfortunately due to the technical limitations of existing equipment do not compete. The luminous image seems however to confirm the 120-degree work specification for the half value angle:
The main part of the beam is actually focused on about one-third of the full angle and fits so well for use in downlights. Reflectors in the lamp, which are indispensable for round bright fluorescent tubes, eliminates with this LED lights. Therefore, it is not so tragic that the lumen values in direct comparison are much lower; the light intensityin the commercial space angle is often still enough.
The indication “11 kWh/1000 ‘ hours under the EU eco-label A + (carton and label left) factored way, with the consumption of the driver in the lamp, which is however much less than 2.5 Watts in reality after the conversion.

My test result:

After the conversion of KVG/SG G24 versions of compact fluorescent lights on this well 8 watts of strong “PL-C”-retrofit model of Philips, you will probably notice no significant loss of brightness and light quality.
Decline of the purse of 12.60 euros per copy may be also acceptable given the measured efficiency of almost 114 lumens/Watt. After all, save energy costs with these mini-LED tubes properly, have paid for three years warranty, a very longlife time and the investment probably already within two years.
You can not expect however top colour reproduction and really flicker-free light – here you get only functional lighting for commercial spaces in principle. For it, I would take the tube Office; nowhere near enough for areas where it depends on good red representations. My up five, strict LED rating scale so genteel holding back and bought only
two stars.

The picky tube for electronic ballast luminaires

The most important first of all to the new “CorePro PL-C”-LED lamp with four pins (base variants G24q-2 and G24q-3): make sure meticulously that in the lamp inside a Philips as ballast driver compatible tested ! Otherwise it can happen you that the tube eats excessively much power, animal hot, smells like an e-waste storage burned off, angry buzzes and possibly some smoke signals are.
No, that’s not horror fantasy of mine, but bitter experience from a first test try with an OSRAM ECGS, which thoroughly went into the pants. And when you say: “Sure, hold a Philips lamp not reconciled with an OSRAM driver”… then I’m telling you, that even by the Philips ballast models only about half the “PL-c”-4-pin lamps should be compatible. “Simple conversion due to” – Pandey!

Joined to the test a complete trio

So competed for the second attempt: A produced in Poland “HF Matchbox red” by Philips for less than 15 euros, as a lampholder one precious lamp called “flat basic glass D300” by RZB for €96,50 (an 18 Watt compact fluorescent lamp and an OSRAM drivers stuck in the normally) and one not dimmable Philips “PL-C 4 p 6.5 W G24q-2 840 120° ECG 4 pin”-LED tube from China for €10,50. Shortly before connecting the light glass cover, the trio looked like:
Provisionally cobbled together and connected, the combination then offered a really appealing, “neutral white” light effects:
So I imagine what might be good on the ceiling or the wall of a hallway or stairwell – looks turned on even more noble than without “juice”. And if you don’t like the vertical main radiation, may most glowing with twelve LEDs under a satin bonnet of “PL-C” a piece after left or right turn (left photo).
After two hours warming up, I’ve measured 7 Watt power consumptionelectric power factor of 0.55 with the combination of driver/lamp, what the “HF Matchbox” about moved a half Watts (idle, it was only 0.1 W). The highest temperatures: Around 40 degrees on the ECG, about 51° on the lamp housing. Both would put away the loose but also 75 °.
When switching on, there was no appreciable delay; After switching off, it was completely dark for about a second. I could not even hear a whirring in any trial – with the ear directly on the “PL-C”.

Fibrillation, there only at extremely high frequency

The result of the flickermeasurements were also unremarkable: The Professional devicereported while 31% rate at 54 kHz – which should be in the range of high power frequency and thus far beyond the threshold of each perception. When my iPod with the “flicker tester” app and 100 Hertz reference frequency were left just rate and index 0.0 9%; the Nikon camera screen showed an absolutely stable, strip-free image. Also very sensitive to flicker natures should therefore deal with the Philips ECG mini tube well.
I was pretty impressed by the subjective quality of light that seemed to me very neutral and balanced. For this my default color fidelity motif spoke (to compare the reference image with natural daylight):
That seemed clearly loyal to color than its counterpart in the stronger and “warmer” KVG/VVG-lamps – without noticeable color casts with more “music” on the rich shades of red and blue. Really came in the laboratory here largely better values ‘ out (Pdf download of the test protocol): RA 83.4 and 10.8 for the particularly demanding additional measuring inks R9 (“red saturated”). The appropriate color temperature remained 3820 Kelvin slightly below the target, as the lumen: 638 instead of 650 lm(lamp printed below) – this difference however lies within the measurement or series tolerance and is meaningless in practice.
For use in washrooms, toilets or wardrobes with mirrors this Lichtfarb variant would be more suitable than the 3000 K version so my opinion – of course this is also a matter of taste.

The radiation is more rectangular than round

No differences there are in the dispersion characteristics for which I show for once two illuminated pictures – with different orientations of the Philips “PL-C”-LED tube:
Good to realize that slightly wider and softer delineated during the cone of light in the picture. The radiation can be just evenly around this LED arrangement and form of the hood does not have any axes, but rather rectangular with different proportions of stray light. A matte glass cover as the RZB lamp above somewhat leveled these deviations.

EU eco-label exaggerates the power consumption

The measured NETefficiency of just under 97 lumens/Watt is lower than in the more powerful 2-pin Variant; the EU eco-label A + but identical (carton and label left). Here, too, a higher 1000 hours power consumption is specified, as the net output of the lamps would give: 9 instead of the well-formed rounded 7 kWh.
That the dissipation of compatible electronic Ballasts (example photo below) but after upgrading should be far less than 2 Watts in practice, you see on my gross measurement of only 7W. By the way: With a non-compliant ballast this value under certain circumstances can rise to almost 13 W – so fingers away from!

My test result:

Whether you what with the suitable in principle for ECG-lights, new and not dimmable Philips “PL-C”-G24q models(“q” stands for quattro, four pins) can begin, stands and falls with the used power supply unit. If it is not in the official list of the compatible ECGS, you can forget the promised “simple” LED conversion.
Otherwise, for example, 10,50 euro for the “neutral white” variant of 650 lumenwould be well spent, because you get silent, largely flicker-free, fast, pretty efficient, reasonably color-faithful and “sober” commercial light for many types of function spaces here from 14 cm in length and 3.3 cm in diameter. If you need more brightness and enough room in the light you can get for two more euros also 950 instead of 650 lumen. But none of these models has the ambition to offer excellent color fidelity.
Actually, my LED rating scale should awarded at least two and a half star to appreciate the small ledge to the above tested, “warm white” 8.5 W-KVG tube. Because of the divenhaften Zickerei at the high frequency driver bridal show, I prefer, however, remain a half a star off and it again only
two stars.