# LED Power Supply

If you want to make a nice in your home, office or cottage, you should know a few things about the power supply of LED tapes and LED downlight cobs. The steps for determining the overall lighting start with selecting a tape or a downlight cob, or both. Then the following question arises: “What power supply should I use?” We will try to clarify and systematize the information in this article.
In general, LED power supplies (drivers) are selected on the basis of several important factors, namely: power, output voltage, level of protection (depending on the environment and the weather conditions), dimmable or non-dimmable. In  the next few lines we will discuss some specifics of the various key parameters:
– Power: it is determined by the load (in this case the length of the selected LED tape), the number of light-emitting diodes, etc. When calculating the system, it is recommended to bear in mind the necessity to calculate the power unit so that there is a power supply of minimum 10% to 30% (example : if the power consumption of your LED tape is 40W, the purchased power supply should be from 44W to 55W).
– Output voltage: there are LED power supplies with different voltages. You must consider the supply voltage of the diode tape, LED lamp or light-emitting diode.

– Degree of protection: we can determine the degree of protection according to the environment in which the lighting will be mounted; weather conditions, external influences, etc.

The degree can be determined according to the below table:

1 ) Protection from contact with areas inside the light fixture that are under pressure as well as protection of the light fixture from the ingress of solid bodies.
2 ) Protection against water ingress.
The symbol indicating the level of protection consists of the letters IP, followed by two descriptive digits, the explanation of which is shown below:

First descriptive digit:

0 no special protection
1 protection against ingress of solid bodies larger than 50 mm
2 protection against ingress of solid bodies larger than 12 mm
3 protection against ingress of solid bodies larger than 2.5 mm
4 protection against ingress of solid bodies larger than 1 mm
5 protection against dust ingress
6 complete isolation against dust

Second descriptive digit:

0 no special protection
1 protection against water flowing vertically
2 Protection against water flowing at an angle of 15 degrees
3 Protection against splashing water
4 Protection against pouring water
5 Protection against hose-directed water
6 Protection against bad sea conditions
7 Protection against immersion in water
8 Protection against placing under water

Dimmability: there are power supplies that can be dimmable, others are non-dimmable and you can use a dimmer to adjust the light intensity after the supply of power. This way you get the brightness you wish according to your mood or your needs.