GrizzLights Horizon – Firmware Update Manual GrizzLights Horizon – Firmware Update Manual What you will need for the Update:– Horizon headlight removed from the EUC– USB-C cable for data transfer (not for charging only)– flat scredriver or any other flat tool to remove the protective cap– Windows PC Step 1 – gently remove the protective cap from USB-C port Step 2 – Plug your light to the PC using USB-C cable Step 3 – download latest Firmware from the bottom of this page. Unzip the package and run the .exe installer. Follow the instructions displayed Step 4 – plug the protective cap back in. The process is finished and you can mount the light back on your EUC. Firmware releases: