NextLight is a popular LED lighting brand that builds their lights in the US and has a reputation for outstanding customer support. NextLight has used a few different dimming methods including 0-10V analog dimming as well as digital RS-485 dimming with a proprietary protocol.
NextLight lights that shipped with a RJ45 port (looks like an Ethernet jack) support 0-10V dimming. These lights have two RJ45 ports which are wired the same, and allow for easy daisy-chaining of lights. The following wiring diagram shows the pin connections on the NextLight RJ45 port:
Use a GrowFlux Screw Terminal Adapter cable to interface a common Ethernet cable to the Universal Dimmer. Just cut an Ethernet cable to expose the wires shown above; strip the orange/white wire and the blue wire and connect both of these wires to the copper terminal in the Screw Terminal Adapter; then strip the orange and blue/white wires and connect them to the silver terminal in the Screw Terminal Adapter.
If your NextLight fixture has two dimming ports (example pictured below), you will need to use a NextLight Adapt Pro converter to adapt a 0-10V signal to NextLight's proprietary lighting control protocol. Unfortunately, GrowFlux does not directly offer support for this proprietary dimming interface - a NextLight Adapt Pro converter is required to interface these NextLight lights to GrowFlux controls.