Why does LED lights flickering when used at my transformer?

Why does LED lights flickering when used at my transformer?

12V DC transformer, 2.5A

1. As the LED is the new generation of illumination lighting source, when the service of their domestic halogen bulb end, some customer may consider changing to LED lighting. After they make a "Plug-in-play" replacement to LED bulbs, then find the LED bulbs very dim, or even flickering. After that, some customer may be confused that why the LED bulb is not the direct replacement of my typical halogen bulbs at domestic environment?
This article will solve the problem together with you.
When find a right LED bulbs to replace the original halogen bulb, most customer will focus on the bulb connector, and the equivalent wattage transfer between LED bulbs and halogen bulbs, but they may ignore one factor, the transformer.
Most customers know that, when they use the halogen down lights in domestic environment, they use a transformer to transfer the 240V input voltage to 12V output voltage for the operation of halogen bulbs. And they have the concept in mind that, most LED halogen replace bulbs are also low voltage. So they make a "plug-in-play" replacement to LED bulb directly. Then found the LED bulbs will not work, and can not find what is wrong.
Actually most transformers in domestic environment are 12V halogen transformer, that is to say, that kind of transformer will transfer a 240V AC input voltage to a 12V AC output voltage. But the designed voltage requirement of low voltage LED bulbs is 12V DC transformer. When that kind of 12V DC LED bulbs operating under 12V AC input voltage, they will become dim, or even flickering.

People may wondering how the LED bulbs replace halogen bulbs?
As below the information will tell you .
2. Here I want to have a brief explanation between AC( alternating current) and DC which is short for direct current.
Electricity flows in two ways: either in an alternating current (AC) or in adirect current (DC). Electricity or 'current' is nothing more than moving electrons along a conductor, like a wire, that have been harnessed for energy. Therefore, the difference between AC and DC has to do with the direction in which the electrons flow. In DC, the electrons flow steadily in a single direction, or "forward." In AC, electrons keep switching directions, sometimes going "forward" and then going "backward."

Differences between AC and DC
Amount of energy that can be carried:
AC: Safe to transfer over longer city distances and can provide more power.
DC: Voltage of DC cannot travel very far until it begins to lose energy.
Cause of the direction of flow of electrons
AC: Rotating magnet along the wire.
DC: Steady magnetism along the wire.
Frequency
AC: The frequency of alternating current is 50Hz or 60Hz depending upon the country.
DC: The frequency of direct current is zero.
Direction
AC: It reverses its direction while flowing in a circuit.
DC: It flows in one direction in the circuit.
Current
AC: It is the current of magnitude varying with time
DC: It is the current of constant magnitude.
Flow of Electrons
AD: Electrons keep switching directions - forward and backward.
DC: Electrons move steadily in one direction or 'forward'.
Obtained from
AC: A.C Generator and mains.
DC: Cell or Battery.
Passive Parameters
AC: Impedance.
DC: Resistance only
Power Factor
AC: Lies between 0 & 1.
DC: it is always 1.
Types
AC: Sinusoidal, Trapezoidal, Triangular, Square.
DC: Pure and pulsating.
3. If the situation in paragraph 1 happen, as a LED lighting seller, I will give you some suggestion.
Solution 1, if you want to upgrade your domestic halogen bulbs to LED bulbs. And your transformer is a halogen transformer, that what you need is a 12V AC LED bulb. Read the description/ label on the LED light bulb to confirm whether the input voltage requirement of that bulb is 12V AC. That is what you are finding.
Solution2, Change your halogen transformer to LED driver. Then you can use the 12V DC LED bulbs as replacement. This solution may be a bit cost, but it will pay off at the long term as the potential saving of LED lights in electricity bills.