• Determine if your application needs a constant voltage or constant current driver.
    1. A CV driver supplies a fixed voltage and is suitable for lighting applications where the number of LED strings and current draw are unknown.
    2. CC drivers supply a fixed current and are suitable for applications that require constant current directly connected to the LED.
  • Determine your application’s output current (mA) requirements.
    1. Note the current requirements of your luminaires. The CC driver should reflect that value output. The data sheets for luminaires typically state the requirements, with the value given in amps (A) or milliamps (mA).
  • Determine your application’s voltage (V) output needs.
    1. CV drivers require the same output as the voltage requirements of the luminaires. For multiple luminaires, each LED voltage requirement is added together for a total value.
    2. For CC drivers, the output voltage must be greater than the requirements of the luminaires.
  • Determine the necessary ingress protection (IP) rating for your application.
    1. IP65 is suitable for some contact with water.
    2. IP67 is suitable for tough outdoor conditions including water submergence up to 1m for up to 30 minutes.
  • Determine your form factor requirement. Ultra-slim LED drivers can save space and thus money. LED drivers that conform to standardized form factors allow for independent interchangeability of different drivers and modules. 
  • Determine your application’s termination method. Some LED drivers have built-in wiring leads, while others do not, which will require you to purchase wires separately. 
  • Determine if you need a dimmable or non-dimmable driver. Not every LED driver on the market today supports dimming.  GRE Alpha has CC and CV LED drivers for flicker-free dimming applications.  GRE Alpha offers LED drivers and dimming modules that are compatible with TRIAC, DALI, DMX, and EnOcean protocols just to name a few.

For a more detailed step-by-step selection guide, please refer to our blog.

(Reference: https://electronics.stackexchange.com/questions/58700/how-to-calculate-voltage-drop-over-and-power-loss-in-wires)


Voltage drop is the amount of voltage loss in a circuit as a result of impedance.  Any component that caries current is subject to resistance or impedance to current flow.  Because LEDs need very low voltages to function, any loss in voltage can alter the color or brightness of illumination and can also cause the LED to flicker.

  1. Determine your input voltage.
  2. Determine your wire run length.
  3. Determine the material of wire (assume copper in most cases).
  4. Determine the proper wire gauge against resistance (AWG value).

Our voltage drop calculator can assist you in selecting the right product for your application. 

(Reference: https://electronics.stackexchange.com/questions/58700/how-to-calculate-voltage-drop-over-and-power-loss-in-wires)

Our dimmers are compatible with a wide array of mainstream brands.  Our dimmer compatibility page can assist you in determining if your product is compatible with a specific dimmer. 

Our products can be purchased through Arrow.com,  our distibution partner Global Lighting & Controls or by contacting us directly by submitting an online inquiry

Our LED power systems come with a global 3-Year warranty.

For more information, please visit GRE Alpha’s Warranty Information page. 

At GRE Alpha we strive to stay on top of the latest trends and technology in LED lighting.  To that end, we hire the brightest minds and partner with the most innovative companies to ensure that we develop products that are not only functional but also meet the needs of the end user.

Feel free to sign up for our newsletter to stay informed about all that we’re up to at GRE Alpha. 

GRE Alpha’s products comply with the latest standards, enabling you to safely and easily adopt our LED power systems to your lighting applications.  We have drivers for all types of applications, including outdoor environments with our products that are rated IP67. 

Click on the links to find out more about GRE Alpha products’  reliability, functions, and usability

Firms are taking a modular approach so that a few different components can be mixed and matched to suit any situation. GRE Alpha LED dimmers and drivers give you more flexibility in lighting design. Read more about how GRE Alpha components can meet and exceed your specifications.

For a more detailed answer, check out our article.

GRE Alpha is a leading provider of next-generation, energy-efficient LED power supplies, and lighting control systems. Our factories produce highly reliable and long-life products that are certified to all major international safety performance standards. Our LEDs are manufactured in multiple locations allowing us to retool and adapt to changing specifications, logistics, and supply chain situations. Browse our catalogs to find the products that are right for you.