These are multi colored LED Neon Strip Lights.

LED neon lights, also known as LED neon flex, are a modern alternative to traditional glass neon lights. They are made using flexible LED strips encased in a silicone or PVC tube, mimicking the appearance of classic neon lights.
LED neon lights are highly flexible and can be bent into various shapes and designs, making them ideal for creative and customized lighting solutions.
LED neon lights are more durable and less prone to breakage compared to fragile glass neon tubes. They are also resistant to vibrations and impacts.