LED lights OK
Many chain stores produce LED lamps under their brands. Lamps of foreign chains are often better and cheaper than those that produce "lamp" brands. As examples I will cite lamps ( IKEA ), ( Lexmann network Leroy Merlin ), Diall network Castorama, ( Auchan network Auchan ).
In the Russian network of hypermarkets O'KEY also appeared lamps under its own brand. I bought them and tested.
The O'KEY store in the Golden Babylon shopping center sells ten types of lamps of its own brand - six “pears” with the usual E27 base - 8, 10 and 13 W with warm (3000K) and cold (4000K) light, two G45 balls with the E27 base and two “candles” with a base E14 minion also with warm and cold light.
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On the packaging of lamps indicated power, luminous flux, the equivalent of an incandescent lamp, color temperature, service life of 25,000 hours and a warranty period of 2 years. Information about the color rendering index and the absence of pulsation is not. The operating voltage is indicated 220-230 V, and with an error (instead of "B" they wrote "W"). The date of manufacture is printed on the lamp housings - part of the lamps is 11.2017, part is 06.2017.
Luminous flux, color temperature and color rendition index were measured using a two-meter integrating sphere and a Instrument Systems CAS 140 CT spectrometer , lighting angle and consumption characteristics with a Viso Light Spion instrument, power consumption with a Robiton PM-2 instrument, pulsation with an Uprtek MK350D instrument . The minimum operating voltage, at which the luminous flux decreased by no more than 10% of the nominal, was measured using a Lamptest-1 device, Stable Stab Instab 500 , LATP Suntek TDGC2-0.5 and an Aneng AN8001 multimeter . Before measurements to stabilize the parameters of the lamp heated for half an hour.
As tests have shown, lamps are divided into two completely different types with different electronics and different consumer qualities.
The pear lamps are equipped with a full-fledged pulsed driver ensuring the absence of light pulsation (the pulsation coefficient of these lamps is less than one percent), correct operation with switches having an indicator, and operation in a wide voltage range without changing the brightness (all pear lamps operate when the network voltage drops to 160 volts and even slightly lower).
"Balls" and "candles" are built on the simplest linear drivers. Unfortunately, they have an unacceptable visible light pulsation (KP 52-56%), their brightness decreases linearly with decreasing supply voltage and drops to 10% at 216 V, they glow weakly when turned on through a switch with an indicator.
All lamps use good LEDs with a color rendering index of more than 80.
The lamp-pears are a little namudril with power (and, accordingly, with brightness) and the equivalent. 13-watt lamps have the appropriate power and replace the 100-watt incandescent lamps, as promised. The power of 10-watt lamps is more than the declared (11.3 and 11.1 W) and light, they also give more than declared, also replacing the 100-watt incandescent lamps, and not 75-watt, as indicated on the packaging. The actual power of 8-watt lamps is also slightly higher, although they give slightly less light than stated, but still it is 736 and 750 lm, which means these lamps will replace 75-watt incandescent lamps, and not 60-watt lamps, as indicated on the packaging.
It turned out that 13 and 10 W lamps are almost the same - they differ in brightness only by 8% and this is almost unnoticeable visually, and there are no lamps replacing 60 W incandescent lamps.
"Balls" and "Candles" OK, I do not recommend to buy because of unacceptably high ripple.
The “Pears” of OKEY are quite decent bulbs and they can be recommended for purchase, but their price is not very competitive, considering that the Castorama hypermarket is located next to the OK'Y hypermarket, where the excellent Diall lamps with a 5-year warranty cost almost half the price.
© 2018, Alexey Nadyozhin
In the Russian network of hypermarkets O'KEY also appeared lamps under its own brand. I bought them and tested.
The O'KEY store in the Golden Babylon shopping center sells ten types of lamps of its own brand - six “pears” with the usual E27 base - 8, 10 and 13 W with warm (3000K) and cold (4000K) light, two G45 balls with the E27 base and two “candles” with a base E14 minion also with warm and cold light.
')
On the packaging of lamps indicated power, luminous flux, the equivalent of an incandescent lamp, color temperature, service life of 25,000 hours and a warranty period of 2 years. Information about the color rendering index and the absence of pulsation is not. The operating voltage is indicated 220-230 V, and with an error (instead of "B" they wrote "W"). The date of manufacture is printed on the lamp housings - part of the lamps is 11.2017, part is 06.2017.
Luminous flux, color temperature and color rendition index were measured using a two-meter integrating sphere and a Instrument Systems CAS 140 CT spectrometer , lighting angle and consumption characteristics with a Viso Light Spion instrument, power consumption with a Robiton PM-2 instrument, pulsation with an Uprtek MK350D instrument . The minimum operating voltage, at which the luminous flux decreased by no more than 10% of the nominal, was measured using a Lamptest-1 device, Stable Stab Instab 500 , LATP Suntek TDGC2-0.5 and an Aneng AN8001 multimeter . Before measurements to stabilize the parameters of the lamp heated for half an hour.
As tests have shown, lamps are divided into two completely different types with different electronics and different consumer qualities.
The pear lamps are equipped with a full-fledged pulsed driver ensuring the absence of light pulsation (the pulsation coefficient of these lamps is less than one percent), correct operation with switches having an indicator, and operation in a wide voltage range without changing the brightness (all pear lamps operate when the network voltage drops to 160 volts and even slightly lower).
"Balls" and "candles" are built on the simplest linear drivers. Unfortunately, they have an unacceptable visible light pulsation (KP 52-56%), their brightness decreases linearly with decreasing supply voltage and drops to 10% at 216 V, they glow weakly when turned on through a switch with an indicator.
All lamps use good LEDs with a color rendering index of more than 80.
The lamp-pears are a little namudril with power (and, accordingly, with brightness) and the equivalent. 13-watt lamps have the appropriate power and replace the 100-watt incandescent lamps, as promised. The power of 10-watt lamps is more than the declared (11.3 and 11.1 W) and light, they also give more than declared, also replacing the 100-watt incandescent lamps, and not 75-watt, as indicated on the packaging. The actual power of 8-watt lamps is also slightly higher, although they give slightly less light than stated, but still it is 736 and 750 lm, which means these lamps will replace 75-watt incandescent lamps, and not 60-watt lamps, as indicated on the packaging.
It turned out that 13 and 10 W lamps are almost the same - they differ in brightness only by 8% and this is almost unnoticeable visually, and there are no lamps replacing 60 W incandescent lamps.
"Balls" and "Candles" OK, I do not recommend to buy because of unacceptably high ripple.
The “Pears” of OKEY are quite decent bulbs and they can be recommended for purchase, but their price is not very competitive, considering that the Castorama hypermarket is located next to the OK'Y hypermarket, where the excellent Diall lamps with a 5-year warranty cost almost half the price.
© 2018, Alexey Nadyozhin
Source: https://habr.com/ru/post/420343/
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