Controllable light tube bar

Hello everyone, I would like to find a light tube that you can control the part of the tube that is lighting while the other remains off, ideally controlling using an analog voltage.

Can you please tell me the general term of this kind of lights in order to do my search, or if you suggest a specific product for the above description?

Thanks in advance,
LK

Hi! The term would be something like “individually addressable LED light bar.” “Individually addressable” means that each LED (sometimes referred to as a pixel) can be set to a different color or turned off rather than the whole bar, typically using a serial protocol called DMX sent to a “controller” which communicates directly with the LEDs. LEDs themselves are controlled by a NRZ protocol where voltage levels are used to send binary data describing the RGB colors for each pixel in sequence. If you’re familiar with embedded programming, you can use something like an ESP32 to control the LEDs directly yourself. There is no such thing as an analog addressable LED. Hope that helps!