Why do LED lights get darker the more you use them?
Release: 2023-05-06 14:00:00
Release: 2023-05-06 14:00:00
LED lights get darker the more you use them, which is a very common phenomenon. To summarize the reasons that can dim LED lights, there are no more than the following three points.
The drive is damaged
LED lamp beads are required to work at DC low voltage (below 20V), but our usual mains power is AC high voltage (AC 220V). To turn the mains power into the electricity needed for the lamp beads, a device called "LED constant current drive power supply" is required.
Theoretically, as long as the parameters of the driver match the lamp bead plate, it can continue to supply power and use normally. The internal complexity of the driver is complex, and the failure of any device (such as capacitors, rectifiers, etc.) may cause changes in the output voltage, which in turn causes the lamp to dim.
Driver damage is one of the most common faults in LED luminaires, usually after replacing the driver, it can be solved.
The LED burned out
The LED itself is composed of lamp beads one by one, and if one or part of it does not light up, it is bound to darken the entire lamp. Lamp beads are generally connected in series and then in parallel - so if a certain lamp bead burns, it may cause a batch of lamp beads to not light up.
There are obvious black spots on the surface of the burned lamp bead, find it, connect it with a wire to the back of it, and short-circuit it; Or replace it with a new lamp bead, which can solve the problem.
The LED burns one once in a while, probably by coincidence. If it burns frequently, consider the drive problem - another manifestation of drive failure is burning the lamp beads.
LED light decay
The so-called light decay is that the brightness of the luminous body is getting lower and lower - this situation is more pronounced in incandescent and fluorescent lamps.
LED lights can not avoid light decay, but its light decay rate is relatively slow, and it is generally difficult to see the change with the naked eye. However, it is not excluded that inferior LEDs, or inferior light bead plates, or due to objective factors such as poor heat dissipation, lead to faster LED light decay.
The drive is damaged
LED lamp beads are required to work at DC low voltage (below 20V), but our usual mains power is AC high voltage (AC 220V). To turn the mains power into the electricity needed for the lamp beads, a device called "LED constant current drive power supply" is required.
Theoretically, as long as the parameters of the driver match the lamp bead plate, it can continue to supply power and use normally. The internal complexity of the driver is complex, and the failure of any device (such as capacitors, rectifiers, etc.) may cause changes in the output voltage, which in turn causes the lamp to dim.
Driver damage is one of the most common faults in LED luminaires, usually after replacing the driver, it can be solved.
The LED burned out
The LED itself is composed of lamp beads one by one, and if one or part of it does not light up, it is bound to darken the entire lamp. Lamp beads are generally connected in series and then in parallel - so if a certain lamp bead burns, it may cause a batch of lamp beads to not light up.
There are obvious black spots on the surface of the burned lamp bead, find it, connect it with a wire to the back of it, and short-circuit it; Or replace it with a new lamp bead, which can solve the problem.
The LED burns one once in a while, probably by coincidence. If it burns frequently, consider the drive problem - another manifestation of drive failure is burning the lamp beads.
LED light decay
The so-called light decay is that the brightness of the luminous body is getting lower and lower - this situation is more pronounced in incandescent and fluorescent lamps.
LED lights can not avoid light decay, but its light decay rate is relatively slow, and it is generally difficult to see the change with the naked eye. However, it is not excluded that inferior LEDs, or inferior light bead plates, or due to objective factors such as poor heat dissipation, lead to faster LED light decay.