It happened! Inexpensive LED lamps with CRI 90+
The color rendering index of light affects how we see objects. The higher this index, the more natural the colors and the more distinguishable shades. The color rendering index for the sun and incandescent lamps is 100, for cheap LED lamps - 70, for standard ones - 80. Until today, LED lamps with a color rendering index of more than 90 could only be bought at IKEA stores (Ledare series).
Finally, the first Russian manufacturer released a series of light bulbs with high color rendering indices. The pioneer was Nanosvet.
I received from the manufacturer 26 models of new lamps that arrived in Russia only a week ago, and tested them.
In the new series there are “pears”, “G45 balls”, “candles”, spots GU10, GU5.3 and GX53. All lamps are available in two color temperatures: 2700K warm white light and 4000K neutral white light.
The results of my tests:
The color rendering index CRI (Ra) for all lamps is indeed higher than 90. For lamps with warm light, the measured color rendering index was 90-92, for lamps with neutral light - 92-94.
The measured luminous flux of all lamps amounted to 94-113% of the declared (average 105%).
The measured power of all lamps does not differ from the declared by more than 1 W.
The light ripple coefficient of all lamps is less than 1%.
All lamps are built on IC drivers, so that their brightness does not change when the supply voltage changes over a wide range. All lamps work and do not change the brightness in the range of supply voltages stated on the package: 170-250 V, while many lamps can work and do not reduce the brightness even at lower voltages (the column “min. Voltage” of the table indicates the voltage at which lamp brightness is reduced by 5%).
All lamps work correctly with a switch having an indicator (do not flash and do not glow weakly when the switch is off).
Compared to the lamp test results of most Russian brands, these results look surprising: it seems that Nanosvet has remained almost the only Russian brand that does not overestimate the parameters on the packaging and does not deceive consumers.
These lamps were the first lamps of the Russian brand to receive a maximum rating of 5 points of an automatic system for calculating the final rating of the Lamptest.ru site.
Luminous flux, color temperature, and color rendering index were measured using a two-meter integrating sphere and an Instrument Systems CAS 140 CT spectrometer, power consumption and power factor with Robiton PM-2, pulsation with Uprtek MK350D. The minimum operating voltage, at which the luminous flux was reduced by no more than 5% of the nominal, was measured using the Lamptest-1 instrument, the Stabil Instab 500 stabilizer, and the Suntek TDGC2-0.5 LATR. Before measurements, to stabilize the parameters of the lamp, they were heated for half an hour.
I will give the spectra of lamps with warm and neutral light.
The first example is a “pear” 600 lm 2700K L160 LE-GLS-8 / E27 / 927, the second example is a “ball” G45 E14 680 lm 4000K L205 LE-P45-8 / E14 / 940.
By the way, this pear, replacing a 60-watt incandescent lamp, costs only 149 rubles. For a lamp with a CRI 90, this is very cool. A bulb costs 219 rubles, which is also not bad, considering that it shines like a 75-watt incandescent lamp.
The spots, for which 60 ° is indicated in the “type” field of the table, are equipped with a lens that allows you to concentrate the light in the center and reduce the blinding effect (habr.com/ru/company/lamptest/blog/391349) .
Powerful GU10 spots have an elongated body.
The manufacturer gives a two-year warranty on all lamps.
A small spoonful of tar. Nanosvet plans to transfer all of its lamps to CRI 90+, so the barcodes of the new lamps coincide with the barcodes of the lamps with CRI 80 and their names are very similar. For example, a “pear” of 600 lm in the new series is called L160 LE-GLS-8 / E27 / 927, and in the old L160 LE-GLS-8 / E27 / 827. One digit difference. Because of this, stores may confuse the lamps of the old and new series and not be aware of their difference.
I am glad that finally appeared inexpensive LED lamps with high color rendering indices. As far as I know, the factory price for identical lamps of the same power with CRI 80 and 90 now differs by only 5%, but none of the major Russian brands order lamps with high CRI, considering that “people don’t need this, the main thing is to make it cheaper ". It is good that at least a small Nanosvet ordered such lamps and brought them to Russia. The main thing now is that with the reliability of these lamps everything would be as good as with the other parameters.
PS Test results of Nanosvet lamps with CRI 90+ at Lamptest.ru .
© 2019, Alexey Nadezhin
Finally, the first Russian manufacturer released a series of light bulbs with high color rendering indices. The pioneer was Nanosvet.
I received from the manufacturer 26 models of new lamps that arrived in Russia only a week ago, and tested them.
In the new series there are “pears”, “G45 balls”, “candles”, spots GU10, GU5.3 and GX53. All lamps are available in two color temperatures: 2700K warm white light and 4000K neutral white light.
The results of my tests:
The color rendering index CRI (Ra) for all lamps is indeed higher than 90. For lamps with warm light, the measured color rendering index was 90-92, for lamps with neutral light - 92-94.
The measured luminous flux of all lamps amounted to 94-113% of the declared (average 105%).
The measured power of all lamps does not differ from the declared by more than 1 W.
The light ripple coefficient of all lamps is less than 1%.
All lamps are built on IC drivers, so that their brightness does not change when the supply voltage changes over a wide range. All lamps work and do not change the brightness in the range of supply voltages stated on the package: 170-250 V, while many lamps can work and do not reduce the brightness even at lower voltages (the column “min. Voltage” of the table indicates the voltage at which lamp brightness is reduced by 5%).
All lamps work correctly with a switch having an indicator (do not flash and do not glow weakly when the switch is off).
Compared to the lamp test results of most Russian brands, these results look surprising: it seems that Nanosvet has remained almost the only Russian brand that does not overestimate the parameters on the packaging and does not deceive consumers.
These lamps were the first lamps of the Russian brand to receive a maximum rating of 5 points of an automatic system for calculating the final rating of the Lamptest.ru site.
Luminous flux, color temperature, and color rendering index were measured using a two-meter integrating sphere and an Instrument Systems CAS 140 CT spectrometer, power consumption and power factor with Robiton PM-2, pulsation with Uprtek MK350D. The minimum operating voltage, at which the luminous flux was reduced by no more than 5% of the nominal, was measured using the Lamptest-1 instrument, the Stabil Instab 500 stabilizer, and the Suntek TDGC2-0.5 LATR. Before measurements, to stabilize the parameters of the lamp, they were heated for half an hour.
I will give the spectra of lamps with warm and neutral light.
The first example is a “pear” 600 lm 2700K L160 LE-GLS-8 / E27 / 927, the second example is a “ball” G45 E14 680 lm 4000K L205 LE-P45-8 / E14 / 940.
By the way, this pear, replacing a 60-watt incandescent lamp, costs only 149 rubles. For a lamp with a CRI 90, this is very cool. A bulb costs 219 rubles, which is also not bad, considering that it shines like a 75-watt incandescent lamp.
The spots, for which 60 ° is indicated in the “type” field of the table, are equipped with a lens that allows you to concentrate the light in the center and reduce the blinding effect (habr.com/ru/company/lamptest/blog/391349) .
Powerful GU10 spots have an elongated body.
The manufacturer gives a two-year warranty on all lamps.
A small spoonful of tar. Nanosvet plans to transfer all of its lamps to CRI 90+, so the barcodes of the new lamps coincide with the barcodes of the lamps with CRI 80 and their names are very similar. For example, a “pear” of 600 lm in the new series is called L160 LE-GLS-8 / E27 / 927, and in the old L160 LE-GLS-8 / E27 / 827. One digit difference. Because of this, stores may confuse the lamps of the old and new series and not be aware of their difference.
I am glad that finally appeared inexpensive LED lamps with high color rendering indices. As far as I know, the factory price for identical lamps of the same power with CRI 80 and 90 now differs by only 5%, but none of the major Russian brands order lamps with high CRI, considering that “people don’t need this, the main thing is to make it cheaper ". It is good that at least a small Nanosvet ordered such lamps and brought them to Russia. The main thing now is that with the reliability of these lamps everything would be as good as with the other parameters.
PS Test results of Nanosvet lamps with CRI 90+ at Lamptest.ru .
© 2019, Alexey Nadezhin
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