I notice that there is a lack of postings regard the blacklights on keyboards. After researching the net, I found the following which might be helpful to some:
sudo apt install -y git dkms build-essential linux-headers-$(uname -r)
git clone https://github.com/tuxedocomputers/tuxedo-keyboard
cd tuxedo-keyboard/
make clean
sudo su
make dkmsinstall
echo tuxedo_keyboard >> /etc/modules
modprobe tuxedo_keyboard
echo "options tuxedo_keyboard mode=0 brightness=25 color_left=0xFFFFFF color_center=0xFFFFFF color_right=0xFFFFFF" > /etc/modprobe.d/tuxedo_keyboard.conf
exit