LED strip FCOB “Ra90 10 W
This cheap LED strip is offered by many sellers on Aliexpress. They all have the same pictures and the same very good parameters are indicated. I bought it, tested it and found out how much the real characteristics matched the promised ones (spoiler: they didn’t).
Relatively recently, a tape made using FCOB (Flip Chip on Board) technology appeared on sale. Its design is in many ways similar to the luminous filaments of filament LED lamps: the strip contains many small blue LEDs, covered with a common strip of phosphor that converts the light to white.
Sellers state the following parameters:
PCB width: 8mm
Connector: DC plug/2 pin wire
Beam Angle: 180°
Color rendering index: RA 90
Rated voltage: DC 12V/24V
Power: 10 W/m
Light color: warm (2700-3500 K), natural (4000-4500 K), cold (6000-6500 K)
In the descriptions there is always a picture like this.
At a low price (I bought 5 meters for 485 rubles) a strip of 320 LEDs per meter is sold.
The reel without any identification marks comes packed in a bubble wrap.
The only designation is on the tape itself: “LY320D/H/E5”. The tape is also nameless.
The main thing that interested me was whether this tape really had a high color rendering index. Alas, no. The Chinese lied. The measured Ra (CRI) was only 79.3, which is a little short even to 80, and there is no smell of RA 90 here. The color temperature of the warm light tape is about 3060K.
With a 24 V power supply, the entire tape consumes 1.005 A (24.12 W), respectively, one meter has a power of 4.82 W, and not 10 W, as promised.
The measured luminous flux of one meter of tape was 597 lm (they promised 900-1100 lm).
This is not the worst tape (in Russia you can still find tapes with Ra 60 on sale), but it’s not at all what they claim it to be.
Looking ahead, I’ll say that I managed to find an inexpensive LED strip on Aliexpress with a real color rendering index above 90, I’ll tell you about it in the very near future.
© 2024, Alexey Nadezhin
