A solution for low light after turning off 110v/220V LED strip lamps (gosens)
2024-05-30
During the usage of high-voltage LED strips and lighting fixtures, one may encounter products with poor quality or design flaws leading to issues like short circuits, flickering, and significant light dimming. These problems can greatly impact user experience. Today, I'd like to address the issue of dim light in high-voltage LED strips and lighting fixtures after the lights are turned off.
This problem is commonly seen in 110V LED strips or high-voltage lighting fixtures, often unnoticed during daytime testing but becomes evident after installation. There are various reasons for this issue, which I'll discuss below systematically:
1.External power supply for 110V LED strips or high-voltage lighting fixtures:
This issue is prevalent in ceiling lights or panel lights using LED strips as light sources. The primary cause lies in a design flaw in the power supply, where the circuit board structure or components don't meet quality standards. The typical solution is to replace the power supply with a better one.
2.Small high-voltage lamps or high-voltage LED strips with a built-in power supply scheme, directly powered by AC:
Apart from design flaws, this setup could be affected by the panel switch. When the panel switch fails to disconnect the power supply directly and needs a power circuit for the indicator light, residual electricity may be generated. If this residual voltage surpasses the LED group's starting voltage, it can affect the lighting fixtures and LED strips. One solution is to connect a residual capacitor (fluorescent switch capacitor) between the switch and the lamp if turning off the lamp without an indicator light switch.
3.There are non-LED strip or lighting fixture-related factors that can contribute to dim light post switching off. This is a more intricate issue, and I'll outline some known causes:
1.Switch controlling the neutral wire, with the live wire directly entering the lamp:
Turning off the light disconnects the power circuit of the lamp only, while the live wire remains connected, leading to faint light emission.
2.Incorrect wiring for a dual control switch:
Placing the dual control switch on the live wire can result in a similar problem. The proper method is to arrange the switch circuit on the neutral wire.
3.The neutral wire carries a charge:
Lights may remain lit after turning them off due to a live neutral wire connection or improper grounding. In theory, if the switch disconnects the live wire, there should be no voltage on the lamp's neutral wire. However, real-world scenarios show that neutral wires can retain a charge due to poor grounding, long wire lengths, thin wire diameters, or high neutral wire currents.
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