LED lamps 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.

    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 11.2017, part 06.2017.

    Luminous flux, color temperature and color rendering index were measured usingInstrument Systems CAS 140 CT , a two-meter integrating sphere and spectrometer , the lighting angle and consumption characteristics of a Viso Light Spion instrument, power consumption of a Robiton PM-2 instrument, pulsation with a 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, a Stable Stabilizer Insta 500 , a LATRA Suntek TDGC2-0.5, and an Aneng AN8001 multimeter . Before measurements to stabilize the parameters of the lamp warmed 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 that have an indicator, and operation in a wide voltage range without changing the brightness 160 volts and even a little 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.

    For pear lamps, they are slightly wise with power (and, respectively, with brightness) and 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 they also give more light than declared, also replacing the 100-watt incandescent lamps, and not 75-watt ones, as indicated on the packaging. The actual power of 8-watt lamps is also slightly larger, 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 bulbs in the range.

    "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, however their price is not very competitive, considering that the Castorama hypermarket is located next to the OK'Y hypermarket, where excellent Diall lamps with a 5-year warranty cost almost half the price.

    © 2018, Alexey Nadyozhin

    Also popular now: