Test cheap Ergolux LED bulbs

More recently, LED lamps were expensive, and now in stores full of lamps are cheaper than 100 rubles. Ergolux lamps, which say that they shine like 100, 120 and 150-watt incandescent lamps, can be bought for 67, 80 and 94 rubles. Check if they are really so bright.

On the packaging of the LED-A60-15W-E27-4K lamp, which costs only 80 rubles, excellent parameters are indicated: power 15 W, analogue of an incandescent lamp 120 W, luminous flux 1220 lm, color rendering index more than 80, power factor more than 0.7, service life 30 000 hours, ripple factor <5%.

Alas, all this is not true.

I tested four pear lamps that read 12, 15, 17, and 20 watts.
Real power was lower than declared by 27-39%. In fact, these lamps consume 9, 9, 11 and 12 watts.

The luminous flux was lower than declared by 11-39%. It's funny, but the 12 W lamp shines brighter than the 15 W lamp.

The equivalent of an incandescent lamp is also significantly lower than stated (indicated 190 and 155 watts, actually 100 watts, indicated 120 and 100 watts, actually 80 and 85 watts).

The color rendering index of the two lamps turned out to be 72 with the declared 80.

The color temperature deviates from the declared 5-11%.

The indicated voltage range does not correspond to the actual one. On a 15 W lamp, “172-265 V” is indicated, but already at 224 V its luminous flux drops by 5%, and at 172 V it burns completely.

The power factor 0.7 is indicated on the lamp boxes; in fact, it does not exceed 0.5.

Three lamps are built on linear drivers, one on the IC driver.

For three lamps, the ripple coefficient does not exceed 0.5%, for LED-A60-15W-E27-4K it is 7.3%.

All lamps work correctly with a switch having an indicator (do not light up and do not flash when the switch is off).

The results of my measurements.

LED lamp reports LED-A60-12W-E27-4K and LED-A60-15W-E27-4K.

LED lamp reports LED-A60-17W-E27-6K and LED-A65-20W-E27-4K.

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 a Robiton PM-2 instrument, pulsation with a Uprtek MK350D instrument. The minimum operating voltage, at which the luminous flux was reduced by no more than 5% of the nominal, was measured using a Lamptest-1 device, a Stabil Instab 500 stabilizer and a Lantra Suntek TDGC2-0.5. Before measurements, to stabilize the parameters of the lamp, they were heated for half an hour.

Unfortunately, I can’t test how long these lamps will last, but judging by the warranty for only one year, we can make the corresponding assumptions.

I am not saying that you need to buy expensive LED lamps. There are many cheap good lamps on the market, but those tested are difficult to attribute.

© 2020, Alexey Nadezhin

Source: https://habr.com/ru/post/undefined/