Spotlights appeared on sale in Leroy Merlin stores, the manufacturer is not indicated on the front side of the package. I bought, tested and studied three models.
On one end there is only a part of the parameters and the name of the model.
But on the other, the manufacturer’s website volpe.ru and the manufacturer Uniel Lighting are indicated.
I measured the parameters of the spotlights “10W”, “30W”, “50W”.
The measured power turned out to be 16-33% lower than the declared one.
The coefficient of light pulsation is 100%. Such light is visually unpleasant and can lead to headaches and exacerbation of nervous diseases.
Unfortunately, I do not have the technical ability to accurately measure the luminous flux of the spotlights, but even if we assume that their efficiency is 100 lm / W, it turns out 740 / 2020 / 3040 lm, which is clearly less than the declared 800 / 2400 / 4000 lm. Most likely they have an efficiency of about 80 lm / W, which gives 590 / 1620 / 2430 lm.
When using a switch with an indicator, the spotlights dimly glow when such a switch is turned off.
The spotlights are built on linear drivers, their brightness drops by 5% at a mains voltage of 211-218 V. At a voltage of 207 volts acceptable according to GOST, the brightness drops by 8-10%.
At the spotlight “10 W”, the board turned out to be skewed and some of the LEDs are blocked by a reflector.
Spotlight board “30 W”. There is an inscription “SUNTEC-20W / 30W 75% -V9 Rev1.0 HS-6447”.
Two SM2082EGS line driver chips connected in parallel are used.
Unfortunately, there are a lot of similar spotlights with 100% pulsation and “fake” power on sale now. Of course, I do not recommend using this even for street and technical lighting.
Peace for everyone!
© 2022, Alexey Nadezhin