Several key parameters can be checked independently in any conditions, for some parameters such as light(koyoso h4 led) flux and the number of lumines, special measuring instruments will be required. Then how to check the lamp yourself - here are a few simple recommendations:

1. connect to the power supply, the corresponding connection wires, they are indicated by the sign + and - if there is no such marking, then the lamp has a bipolar driver, that is, where + and where - does not matter.
2. Look at the operation of the LED, the light should be bright and uniform, without flickering, the LEDs should glow evenly over their entire area.
3. If the lamp is equipped with active cooling - cooler, then the work of the cooler should be barely audible, if with the heating of the LED the cooler increases its speed, then this lamp will not last long, since the driver does not give the appropriate signal about the temperature of the lamp.

As for the installation of LED lamps on the high beam

Here, there are no such difficulties, you can safely put any type of LED that does not correspond to the similar location of the filament, meaning blinding in the high beam is a common thing. For maximum light output, it is recommended to use LEDs of the following types: CREE, COB, Epistar. After you have decided on the choice of an LED lamp, you need to check its characteristics. How to connect an LED lamp: Since LED lamps are designed so that no alterations of the car's electrical equipment are required for their installation, it is enough to install the lamp in the seat and connect the power wires in accordance with the polarity of the car.

Warranty and service life of LED lamps

Each manufacturer regulates warranty obligations in its own way, as a rule, most manufacturers give a 1-year warranty on their lamps. Premium lamps can have a warranty of 2 years. The resource of LED lamps - as a rule, a high-quality lamp works for its declared resource of 30,000 hours. That with active use is equal to 4-5 years. If you use light less often, then the performance can reach 7-8 years. As for low-quality lamps, it is not uncommon for such lamps to not work out the warranty period, or a month or two after the end of the warranty period, the lamp fails.

 Source: https://koyosoled.com/