Connector Size: 5.5 x 2.1mm is the most common size for DC power, but always verify this matches your power supply.
Polarity: You'll need a center-positive male connector to align with the standard female jack.
Voltage: Look for connectors rated for the voltage range of your neon light, typically 1-38V or higher.
Current: The connector should be rated for the maximum current your neon light will draw, often 5A.
Wire Gauge: Ensure the connector can accommodate the wire size of your power cable, such as 16-24 AWG