The maximum length to which you can extend LED strip lights depends on several factors including the voltage of the LED strip, the power supply being used, the current draw of the LEDs, and the specifications provided by the manufacturer.

Typically, LED strip lights come in reels of varying lengths, such as 5 meters (16.4 feet) or 10 meters (32.8 feet). However, you can often extend them by connecting additional strips.

Here are some considerations for extending LED strip lights:

1. Voltage Drop: As you extend the length of the LED strip lights, voltage drop becomes a concern. Voltage drop can lead to dimmer lights or uneven illumination towards the end of the strip. To minimize voltage drop, you may need to use thicker gauge wire for longer runs or use voltage amplifiers or signal repeaters.

2. Power Supply: Ensure that your power supply is capable of supplying enough power to the extended length of LED strips. Check the wattage rating of the power supply and compare it to the total wattage of the LEDs you plan to connect.

3. Manufacturer Recommendations: Always refer to the manufacturer's specifications and recommendations for maximum strip length and power requirements. Exceeding these guidelines could lead to overheating or damage to the LEDs.

4. Soldering vs. Connectors: Depending on the type of LED strip lights you have, you may need to solder connections between strips or use connectors provided by the manufacturer. Soldered connections tend to be more secure and reliable, especially for longer runs.

5. Signal Amplification: For longer runs, especially if you're using addressable RGB LED strips (such as WS2812B), you may need to use signal amplifiers or repeaters to maintain consistent data transmission along the entire length of the strip.

In summary, while there's no strict limit to how far you can extend LED strip lights, it's important to consider factors like voltage drop, power supply capacity, and manufacturer recommendations to ensure proper functionality and safety.