The power supply you need will depend on the TYPE of the LED flex strip light you are using for your project. The correct power supply needed for your LED lighting project is easy to calculate.
Step 1 Which LED strip light brand will you use?
The first step is to choose which flexible LED strip light you are going to use for your project.
The power source needed depends on the length that you cut the LED strip. Let’s use the 150 LED RGB strip light as an example: Each meter uses 7.2 watts. Add the amount of lenght together, multiply by 7.2, and you have the wattage used. You should add 20% more room in the power supply so take the wattage, and divide by .8 to get the power supply needed.
Example. 8 meter of RGB LED strip light. 8 X 7.2 watts = 57.6 total watts used. 57.6/.8= 72 watts. You need a power supply that will handle 72 watts.
Our website of the led strip:http://www.pwled.com/e_product.php?showlei=&Leiid=83