The "7816 1.5W 3LED module" is a specific model of LED lighting module. Let me explain the meaning of this model to you:

7816: This section is usually the model or identifier of the LED module. The model can vary depending on the manufacturer, used to distinguish LED modules of different models and specifications.

1.5W: This refers to the total power consumption or power consumption of LED modules, which is 1.5 watts. This represents the power consumed by the LED module in its normal working state.

3 LED module: This indicates that the LED module contains three LED lights. These LED lights are usually connected in parallel or series to provide light together. You may need to check the specification sheet of the module to understand the specific characteristics of the LED, such as color temperature, brightness, voltage requirements, etc.

This type of LED module is typically used for various lighting applications and can provide different brightness and colors according to different needs. They can be used for various occasions such as indoor lighting, outdoor lighting, billboard lighting, sign lighting, landscape lighting, etc.