Almost exactly a year ago I had led for the first time “Retrofits” of the German provider “LED’s CHANGE THE WORLD” (LCTW) in the test. Now, three new dimmable lamps, which beat their predecessors at the price / performance ratio to lengths and also somewhat more noble look come from there.
However, first test candidate is not a spotlight, but a dimmable LED replacement for 60-Watt standard incandescent (see link on http://www.toughestflashlights.com/2017/01/led-technology/): the 11 Watt strong-A60 “Bulb” to the current special price of 12 euros (picture on the right). Nominally it has the total 806 lumens brightness required by an EU regulation, glows with a “warm white” color temperature of 2725 Kelvin (+/-145 K tolerance) and a color rendering index of about CRI 80.
As all LCTW lamps is “Made in p. R. C.”, come from the people’s Republic of China, but was according to the exact specifications of the German provider.Despite the very low sale prices you emphasis here on high light quality with relatively small “Binning”– and manufacturing tolerances. 30 “Medium Power”LEDs from OSRAM are used as the light source.
In contrast to older LCTW-“Bulbs”, the new A60 has no larger cooling fins or openings, but a largely smooth surface. With a diameter of 6 cm and a height of 12 cm, it is but not thicker, but a fair bit longer than traditional incandescent bulbs. The matte cover could protrude a little light with very short screens.
145 degrees half value angle
While otherwise on the packaging and the Web site all the important parameters are found, unfortunately lacks an indication to radiation or half value angle. On demand I got however by LCTW laboratory test values and diagrams. The reveal that at least half of the maximum luminous intensity is projected at an angle of 145 degrees, in a cone of 250 degrees “Field angle” there is at least one-tenth. My lights picture confirms the theory that held most of the brightness in the upper half, it remains to not completely dark but also down:
The LCTW-‘Pear’ is so not a real round spotlight, but offers significantly more light than a 60-watt light bulb brightness all around distributed their 700 lumens in one half of the full angle. It also measured in the laboratory, the actual value speaks of just 890 lumens with the A60 LED. In many cases, you could replace even a traditional 75-watt lamp to.
For the calculation of the “A” rating in the applicable from September EU efficiency label for light bulbs, LCTW has used only the nominal 806 lumen at 11 Watts of power consumption (73 lm/W). By the real value (approximately 80 lm/W) that could be the better level “A +” according to my calculations.
In practice, shone the A60 without dimmer after a small delay of less than 0.5 seconds and 12 Watt moved here according to my rather inaccurate energy meter. On the lowest position of a non adjustable phase section dimmer that declined to about 3 Watts. The brightness was variable without flickering in the range between 25 and 100 percent.
This was accompanied by a slight whirring of the lamp – audible depending on dimmer position from a distance between 10 and 20 cm. She remained largely quiet at a desk without dimmer.
“Second, Memorial” at the dimming
Also the strongest dimming switch-on delay increased by less than one second; When switching off, it was still around half a second long bright. This phenomenon occurs in many modern dimmable LED lamps, because an integrated circuit in the ballast initially determines which voltage is applied and then activates the LEDs. Also, a capacitor acts as a buffer for the switching on and off. High switching currents are avoided and increases the life of the lamp.
LCTW promises at least 25,000 light hours and 100,000 switching cycles. I think it is credible, because the lamp continuously in my open test version at the hottest point of the casing was only around 57 degrees hot. It is one of the coolest LED bulbs in this performance class that I’ve tested so far. In principle, LCTW offers for all its models an extended warranty period of three years.
It is incandescent fans warm to the heart
The subjective impression of color should delight even stubborn light traditionalists: even in the direct view of the led “Bulb” at least as “warm” resembles a clear 60-watt incandescent light bulb. Also the radiated light has a slightly yellowish/reddish appearance. You can get an idea of when looking at my Color fidelity-standard model – a red Ducati in miniature against a white background:
Most call it probably “cozy comfortable”, while turn away to some friends of the daylight-like, “cool white” colour temperatures with horror. No, these A60 is but not work lamp for Office or workshop while pretty color fidelity. If there was a Pope of the “warm white”, homely light, he was probably at LCTW at home (maybe he is but also in Austria moved from Dornbirn to Lustenau).
My test result: 12 euro for dimmable LED replacing a 60-watt incandescent light bulbare currently almost unbeatable – in there especially with brands technology. For that, there actually full credit on my up 5 enough LED rating scale. Because the new A60-“Pear” by LCTW but not too good round spotlight, not perfectly still lights up and still do this a little long is, that’s enough only for
50W halogen ‘ out – 6.5 LED Watt ‘ pure
This LCTW offer seems not to be really new: A dimmable LED equivalent for 50-watt high-voltage GU10 halogen spots there there already before a year – also 35 degree beam angle and 750 candela light. However, this cream-white spot was never officially included in the company’s online shop, but get only on request and in between times via Amazon for less than 14 euros.
Since then, we have ten such LED lamps in use and still has the halogen similar light color, smooth dimming and color fidelity sufficient even for a kitchen are pleased.And now there is the same for only 9.90 euro? No, there’s more.
New color, new Nichia-“Sixpack”
The direct comparison reveals the differences between “old” and “new”: at the request of a majority of LCTW customers, the spots are now silver. Instead of four chips of the U.S. manufacturer “Cree”, six “Medium Power”LEDs light up by the Japanese company Nichia under the plastic lens cover (pictured top left). The mounting of the modules is something similar “chip on board” (COB) method, lies, but closer to the known SMD technology. The official luminous flux value climbed by 320 to 330 lumen.
Needed just 7 watts of power to be confirmed by my gauge (efficiency: approx. 50 lm/W). This was my test not adjustable dimmer flicker-free and continuously to around 2 Watts down – then there are instead of 330 little more than 80 lumens.
Not dimmable quieter and more fuel efficient
Similar to the above tested A60 lamp you need but for dimming with slight whirring noises and short on and switch-off delay (< 0.5 seconds) account. To hear the whirring 10 to 15 cm distance is approximately depending on the dimmer. Without control, the spot remains quiet as a mouse, has but strangely still about a quarter of a second reaction time when you turn and then needs only around 6 Watts according to gauge.
The generous cooling fins apparently offer a regular “chimney effect” and raise the maximum housing temperature even during prolonged operation not over 58 degrees Celsius. Small disadvantage of design reminiscent of the Older LEDON spots: 57 mm long, the LCTW GU10 with very short Spotlight cases can survive anything. Is but mostly no optical break – especially if the lights have a similar color as the silver spots. The maximum diameter of 50 mm already comply with the standard for PAR16 lamps.
Other color impression than in the previous
A little surprise was there for me when the light color (by the way, everything also applies for the GU5. 3 version): which now no longer exactly so looks like the nominally same 2725 Kelvin of the predecessor or the Current LEDON spots (with LEDs “Cree”).Clearly it is still “warm white”, less yellow and red in the mix but with a stick. This ensures even with my fidelity “standard test image” a slightly different impression than with the A60 lamps above:
Especially the lower of white, red and black surface’s yellow coloring is quite striking – it seems all a little “true”, neutral as with the LCTW-“Pear”. Who don’t even know, that here the other LED chips in there are, can assume at least.
The light image but not great differs from that of the Older LCTW spots. It has – as usual – a very bright and wide radiant core area, is perhaps anything else balanced, homogenous – some more stray light outside the 35-degree half value angle than previous models:
This very halogen spot-like pattern also applies to the low-voltage version, whose LED and lens / lens Assembly is completely identical. According to the applicable from September EU comparison, “Retrofits” for 50-watt high-Volt PAR16 halos within an angle of 90 degrees at least 300 lumens must radiate light power. This requirement exceeds the new LCTW-GU10 lamp by 10 percent. Who is so, must not complain afterwards about lack of brightness.
Despite low price no “cheap lamp”
The efficiency of around 50 lumens/Watt is sufficient for the old as well as the Future EU energy label for the classification of “A”. The life of information are the same as the A60 lamp: an average 25,000 lights hours before abating to 70% of initial brightness, 100,000 survive cycles. Of course, three-year warranty apply here as well.
My test result: The extremely cheap price of 9.90 euros currently resulted mainly from the absence of intermediate – or dealer, and from the low administrative and marketing costs. He is not paid but with a lack of performance and quality, even if the LCTW spot is still not perfect, dimmable LED bulb. Many much more expensive competitive products are neither. For perfection, there would be five stars, here’s at least four and a half.
The smallest addition to the LCTW range
The third lamp of the test trio can be operated with 12 volt DC or AC voltage. Also it is dimmable, shines in silver, 50 mm diameter, 330 lumen luminous flux, 750 candela brightness, 35 degree beam angle, average 2725 Kelvin color temperature and a CRI of about CRI 80.
No wonder, finally, the upper part of their innards Nichia-LEDs (pictured left)is a likeness of the GU10 interiors – including the six. Including is however significantly slimmer and shorter, because at low-voltage LED lamps less ballast is needed. They are therefore only 51 mm long, which usually fits into all the lights, where were previously power-guzzling halogen spots in it.
The nominal power consumption is also slightly smaller than in the high-voltage version 6.3 Watts. This you have to add the consumption of an LED-compatible, dimmable transformers however – my test driver around 1.5 Watts in idle. Overall more economical’s theory, when parallel connect multiple LED spots – up to the imprinted transformer maximum load. Whose consumption increases this fact only marginally.
Under regular conditions, the LCTW GU5 lights. 3-spot without noticeable delay, consumes the dimmer operation between 6.5 to 1.5 Watts and can be flicker-free and continuously to less than 25 percent of maximum brightness down. In this minimum setting my phase section dimmer, the Strahlerchen briefly forgets his good manners and begins to WHIR quietly. Okay, let’s rather say: very, very quietly. as from 5 cm ear distance, the sound is hardly to perceive. This should be no problem even in the bedroom, because whoever puts himself already ‘ ne switched lamp directly on pillows?
With an unregulated switch the spot remains completely still, seems to run even only to full form, pulls well 7 watts from the transformer and lights slightly brighter than on the dimmer fully turned up. This difference is not an isolated case: even high-priced brands LED spots reached also with the dimmers recommended by the manufacturer only 70 to 80 percent of their maximum power. Remedy: Dimmer with adjusting screw buy and use a small screwdriver to vote individually on transformer and lamps.
Why is this not a 50-watt replacement?
Ungedimmten continuous in my open test version I have measured at the hottest point of the enclosure for a maximum of 61 degrees. This is not critical and relatively cool for this performance class. All what you have to light effects, color fidelity, eco-label, life and guarantee of GU5. 3 spots need to know can you top look in the test of GU10 Spotlight – there’s absolutely no difference.
If you are now wondering why this spot despite equal light 330 lumen only and not – as replacement for 35 Watt powerful halogen spots is being touted as the GU10 spot – for copies of 50 Watt: MR16- low-voltage-halos are more efficient than their PAR16high voltage-sisters and therefore into the EU comparison chart at 35 watts with an equivalent – minimum light stream of 300 lumens. You can’t find 50-watt MR16 halogen spots there at all.
My test result: If a brand LED spot light quality, brightness and easy dimming would light up, I would consider a price of around 20 euro currently appropriate. The LCTW spot can do it all for only 9.90 euro – always assuming that he has the right players withcorrect driver and dimmer. However, apply “Retrofits” for other low-voltage-LED, as well. If we let the occurring only in special circumstances and negligible mini buzz aside, this is a perfect LED spot, earned the maximum number of my rating scale : five stars!