Calculating Power Supplies for LED Strip Lights

Calculating Power Supplies for LED Strip Lights

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In case you plan to install LED strip lights (also known as LED tape), you need to be capable of accurately calculating the power required. Having an inadequate power supply will lead to only some (or none) of the LEDs enlightening or can cause annoyance flicker. An overstated power supply will cost more to buy and will also be more difficult to fit as they are bigger. Jack Blog

To be able to calculate the power supply required for your new LED strip lights, you need to know:

  • Length of the strip or tape
  • Number of LEDs per meter
  • Power consumption per LED

If you wish to calculate the size of the power supply (in Amps), you will have to multiply the length of the LED tape by the number of the LEDs per meter and then multiply this by the power of the LED (0.08w to 0.24w per LED are characteristic values). Furthermore, you then have to divide the value by 12 volts to calculate the required Amperage of the power supply.

A simplified representation of the formula is—

(Length of LED Strip x LEDs per Metre x LED Power) / 12

We advise you to add at least 10% to the calculated value to consent for the cables’ resistance and losses.

Calculation Examples:

Example 1: A 5m roll of SMD3528 (0.08w) with 60LED/m would be: (5m x 60 x 0.08) / 12 = 2amps +10% = 2.2Amps.

For any LED strips over 2 meters in length, you can deliver a 12volt feed to both ends of the strip or one feed in the middle by cutting the strip into two and linking the power supply to both strips. This gives a more smooth power distribution and should be responsible for more consistent lighting.


LED Strip Light Uses

There are two prime explanations for using LED strips. One is competence – LED lights are very efficient, with most of the power successfully producing light, not heat. Their enormously long life (20,000 hours is characteristic) means that they also do not need to be substituted very often, leading to massively abridged lifetime expenses.

The additional reason is aesthetic. LED lights can be made tremendously small – some LED lighting strips are as thin as 4mm – and so can be connected in places where traditional lights would not fit. Additional to this, the various LED color options comprising RGB LEDs with remote controlled color changing capabilities. This gives a whole new range of likely lighting effects that can melodramatically alter a room’s look.

With the backing of Wonpro manufacturing facilities in Taiwan and China, they run a very efficient SALES operation in the US. Their website always ranks Top 10 in Google, Yahoo, and Microsoft Bing. They, however, do not have a retail store nor a fancy office. They have 3 big warehouses – they pour all their resources to support their factories and build huge inventories of every Wonpro product they carry in the US. Their goal is to have enough Wonpro products in stock so that their customers can get whatever they want whenever they need it!

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