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LED Strip Lights

Power Supply For LED Strip Lights-Guide

LED lighting is becoming extremely popular nowadays. From outdoor Christmas lights to indoor lighting in homes and businesses, to LED signs and billboards, more and more people are recognizing the benefits of LED lights.

To power your LED lights, you need an LED driver (sometimes known as an LED transformer or power supply). In this short article, I'm going to go over what you need to know about the various types of LED drivers out there.

Kaytai is a professional LED lighting manufacturer, we have experience with led strip light power supply. Here will give you some suggestions.

Article Guide

    Why do you need an LED power supply?

    LED lamps are very different from traditional light sources such as incandescent or halogen lamps. In particular, they require a specific type of power supply that can convert the mains voltage into the correct value for each lamp.

    In addition, LED lamps have a limited life span and must be replaced after some time; this is why it is important to choose a suitable quality item that guarantees long-lasting performance and safety even in conditions of continuous use.


    What factors should you consider when buying an LED power supply?

    The first thing to consider is the power of the LED power supply, measured in watts (W). This parameter indicates the maximum amount of energy that can be supplied by the device during use. It is important to choose a model with sufficient capacity so that it can meet your needs without overheating or burning out too soon. However, do not buy a lamp with more wattage than necessary because this will only increase its cost unnecessarily.

    Another important feature is voltage stability: it should not fluctuate more than 5% above or below nominal values at all times during use (in other words, no more than ±5%). Otherwise, this could result in damage to parts of

    What type of power supply do you need to consider? Constant voltage or constant current LED power supply?

    There is constant voltage and constant current led power supply in the market. What are the differences between them? KayTai will tell you everything.

    What is a constant voltage LED power supply?

    Constant voltage LED drivers typically have a fixed voltage rating of 5 V, 12 V, 24 V, or some other voltage rating with a range of current or maximum current.

    All our LED strips must be used with a constant voltage power supply.

    What is a constant current LED power supply?

    Constant current LED drivers will have similar ratings but be given a fixed amp (A) or milliamp (mA) value with a range of voltages or maximum voltage.

    Constant current power supplies generally cannot be used with LED strips. Because the current of the constant current power supply is fixed, the current will change after the LED strip is cut or connected.


    You need to find out how many watts the LED light will consume. If you wish to run more than one light with one power supply, you must add the wattages to find the total wattage used. Ensure you have a big enough power supply by giving yourself a 20% buffer of the total wattage calculated from the LEDs. This can quickly be done by multiplying the total wattage by 1.2 and then finding a power supply rated for that wattage.

    For example, if you have two rolls of LED strips, each roll is 5 meters, and the power is 14.4W/m, then the total power is 14.4*5*2=144W.

    Then the minimum wattage of the power supply you need is 144*1.2=172.8W.


    You need to ensure that your LED power supply’s input and output voltage are correct.

    Input voltage

    The input voltage is related to which country the power supply is used.

    The mains voltage is different in each country and region.

    For example, 220Vac(50HZ) in China and 120Vac(50HZ) in the United States.

    For more information, please read the Mains electricity by country.

    But some LED power supplies are full voltage range input, which means this power supply can be used in any country worldwide.


    Output voltage

    The output voltage needs to be the same as your LED strip voltage.

    If the output voltage exceeds the LED strip power supply, it will damage the LED strip and may cause a fire.


    All of our LED strips are PWM dimmable, and if you need to adjust their brightness, you must ensure your power supply has the dimming capability. The data sheet for the power supply will state whether it can be dimmed and what type of dimming control is used.

    Common dimming methods are as follows:

    1. 0/1-10V Dimming

    2. TRIAC Dimming

    3. DALI Dimming

    4. DMX512 Dimming

    More information, please read the article How to Dim LED Strip Lights.

    Temperature and waterproof

    An essential factor that cannot be ignored when choosing a power supply is the use area and use environment. The power supply operates most efficiently if used within its temperature parameters. Power supply specifications should include a safe operating temperature range. It’s best to work within this range and ensure you don’t plug it in where heat can build up and exceed the maximum operating temperature. It’s usually a bad idea to plug a power supply in a cubicle that doesn’t have a ventilation system. This will allow even the smallest heat source to build up over time, ultimately cooking power. So ensure the area isn’t too hot or too cold, and the heat doesn’t build up to damaging levels.

    Each LED power supply is marked with an IP rating.

    An IP rating, or Ingress Protection Rating, is a number assigned to an LED driver to indicate the level of protection it offers against solid foreign objects and liquids. The rating is typically represented by two numbers, the first showing the protection against solid objects and the second against liquids. For example, an IP68 rating means the equipment is completely protected against dust ingress and can be submerged in water up to 1.5 meters for up to 30 minutes.

    If you need to use the LED power supply outdoors where it is exposed to rain, please select an LED power supply with an appropriate IP rating.



    Another critical characteristic in choosing an LED driver is efficiency. Efficiency, expressed as a percentage, tells you how much input power the driver can use to power the LEDs. Typical efficiencies range from 80-85%, but UL Class 1 drivers that can operate more LEDs are typically more efficient.

    Power factor

    The power factor rating is the ratio of real power (Watts) used by the load compared to apparent power (Voltage x Current drawn) into the circuit: Power factor = Watts / (Volts x Amps). The power factor value is calculated by dividing real power and apparent value.

    The range for power factor is between -1 and 1. The closer to 1 the power factor is, the more efficient the driver is.


    When choosing a power supply for your LED project, it’s essential to know where it needs to be installed. If you want to put it inside the product you are making, it has to be small enough to fit in the space provided. If it’s outside the app, there should be a way to mount it nearby. A wide variety of power supplies are available in different sizes and shapes to suit your needs.

    Class I or II LED driver

    Class I LED drivers have basic insulation and must include a protective ground connection to reduce the risk of electric shock. Their safety is achieved through the use of basic insulation. It also provides a means of connecting to a protective grounding conductor in the building and connecting these conductive parts to the earth if the basic insulation fails, which would otherwise generate a dangerous voltage.

    Class II LED drivers not only rely on basic insulation to prevent electric shock but must also provide additional safety measures, such as double insulation or reinforced insulation. It does not depend on either the protective ground or the installation conditions.

    Safety protection function

    For safety reasons, LED power supplies should have protection features such as over-current, over-temperature, short-circuit, and open-circuit. These safety measures lead to a faulty power supply shutdown. These protection features are not mandatory. However, if you want to use it safely in case of problems, you should only install power supplies with these protection features.

    UL listed certification

    LED power supply with UL certification means better safety and better quality.

    Also, some projects require the LED power supply to have UL certification.


    Top power supply brands
    To help you get a reliable LED power supply faster, I have provided the top 5 famous LED brands. For more information, please read the Top LED Driver Brand Manufacturer List.



    Philips Lighting - LED & Conventional lighting solutions

    Philips Lighting is a global market leader with recognized expertise in the development, manufacturing application of innovative LED lighting solutions


    Osram led chips 1

    The New OSRAM | Light is OSRAM

    TheNewOSRAM Osram offers innovative and sustainable lighting solutions The product portfolio of Osram ranges from modules, LED lamps and luminaires to light management systems



    MEAN WELL Switching Power Supply Manufacturer

    MEAN WELL Switching Power Supply MEAN WELL is a Switching Power Supply manufacturer in Taiwan – SMPS, SPS manufacturer, AC DC , DC DC , DC AC, industrial power supply, Medical power supply, Din Rail power supply, LED power supply, LED driver, charger, inverter, adaptor, rack power, modular configurable power, open frame power



    Tridonic GmbH & Co KG

    As a leading global provider of smart and efficient lighting solutions, Tridonic empowers its customers and business partners to become more successful by making professional lighting smarter, more exciting, and more sustainable



    Inventronics sole focus on LED drivers and accessories enable us to stay at the forefront of technologies to better empower the next generation of LED luminaires.

    Inventronics - Driving the Lighting Revolution



    Lifud Technology Co., Ltd

    As a leading global provider of superior quality LED drivers, LIFUD is supporting our customers and partners with the LED drivers of the highest reliability and impressive energy savings and make the customers and partners



    LED Driver, Industrial Control, Power Electronics, Power Distribution Supplier

    Here is Eaglerise Electric Electronic which produces LED Driver, Industrial Control, Power Electronics, Power Distribution, LED Constant Current Driver, LED Constant Voltage Driver, LED Dimmable Driver, LED Super Thin Driver, LED Water Proof Driver



    MOSO Technology Co., Ltd

    As standing at the forefront of internet +, MOSO staffs will make all efforts to be committed to become the worldwide new energy solution provider and contribute to the global energy conservation and carbon emission!

    We don't want to buy fake led power supply.Then you can buy from the trusted supplier.Here is for your choose:



    Brightest LED strip lights, Flexible LED Strip Kits, LED Distributors


    led supply 1

    LEDSupply - For All Your LED Project Needs!


    top led aluminum profile brand

    China Led strip light manufacturer Led aluminum profile factory-Lightstec®

    How to connect LED strip lights to the power supply?

    After choosing the right LED strip power supply, we connect the red and black wires of the LED strip to the corresponding terminals or leads of the power supply, respectively. Here we need to pay attention to the positive and negative terminals of the strip. They must correspond to the positive and negative poles of the power supply output. (The symbol + or +V indicates the red wire; the mark – or -V or COM indicates the black wire).


    Can I connect many LED strips to the same LED power supply?

    Yes, you can. But make sure that the wattage of the LED power supply is sufficient, and make sure that the LED strips are connected to the LED power supply in parallel to reduce the voltage drop.


    How far can I install an LED tape from its LED power supply?

    The further away your LED strip is from the power source, the more noticeable the voltage drop will be. If you’re using long cables from the power supply to the LED strips, make sure those cables are made of thick copper and use as large-gauge cables as possible to help minimize voltage loss.

    For more information, please read What is LED strip voltage drop?

    Tips for installing LED power supply

    LED drivers, like most electronics, are susceptible to moisture and temperature. You need to install the LED driver in a dry location with plenty of air and good ventilation to maintain its reliability. Proper mounting is critical for air circulation and heat transfer. This will ensure optimal performance and long life.

    Leave your LED power supply some spare wattage

    Make sure you do not consume the entire capacity of the power supply. Leave some room to use only 80% of your driver’s maximum power rating. Doing so ensures that it will not always run at full power and avoids premature heating.

    Avoid overheating

    Ensure that the LED power supply is installed in a ventilated environment. This is beneficial to the air to help the power supply to dissipate heat and ensure that the power supply works to a suitable ambient temperature.

    Minimize the “on” time of the LED power supply

    Install a switch at the mains input end of the LED power supply. When lighting is not required, disconnect the switch to ensure that the LED power supply is truly off.

    Troubleshooting common LED power supply issues

    Always ensure correct wiring

    Before applying power, the wiring needs to be checked in detail. Incorrect wiring may cause permanent damage to the LED power supply and LED strip.

    Make sure the voltage is correct

    You must ensure the LED power supply’s input and output voltages are correct. Otherwise, the incorrect input voltage may damage the LED power supply. And the wrong output voltage will damage the LED strip.

    Make sure that the LED power wattage is sufficient

    When the LED power supply wattage is insufficient, the LED power supply may be damaged. Some LED power supplies with overload protection will automatically turn off and on. You may see the LED strip constantly turn on and off (flicking).


    Overall, choosing the right LED power supply should be quite simple. When you factor in all of the above factors, you'll have a good idea of what is available to help you achieve your goals. There are subtle differences between brands and models, but it doesn't take much to find one that will help realize your goals. With this information in hand, you will be able to confidently choose the best LED power supply for your purpose.

    KayTai is always giving you the right suggestion for led power supply. Any requests, pls contact us!

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