Interesting material, but suffers from the curse of these mains voltage LED strips, which is the flicker at 100 or 120Hz. Not visible when looking directly at it, but definitely visible in peripheral vision and on moving objects.
One slight error in the video. I said I was testing a metre, but it was a half-metre (20") section that I tested as 8W. So 16W per metre.
The dimmer is completely unsuited to sensible control of the LEDs, since they don't light until quite far into the sinewave and then snap on. The snubber network is perplexing. Almost as if they felt they had to use it, but kept increasing the resistor value because it would be making the LEDs glow visibly. 200K is way too high for a snubber. They would have been better just not using it.
The use of the COB strip inside with densely packed LEDs gives a very linear glow. A nice use for this strip would be to combine it with a capacitive dropper with smoothing, for a low level flicker-free glow along the full length.
For functional illumination I'd tend to recommend using low voltage DC strip for a smooth PWM dimmable illumination. It's more versatile due to being able to be cut in much smaller increments, and the low voltage supply is safer too. The high voltage strip has the advantage of lower current along very long runs, but I'd not want to use the clip-on friction connection for any significant load.
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29 май 2023
