I'm glad to see you are working on UEFI compatibility Jerry. 
I first installed the beta without an internet connection. It installed without a problem. Linux Lite was not an option in Grub when I rebooted.
I tried the install again while connected to the internet. I received the error below.
"The 'grub-efi-amd64-signed' package failed to install into /target/. Without the GRUB bootloader, the installed system will not boot".
I have 6 other Ubuntu based distros on this PC that installed and run without a problem. They are Ubuntu 16.04, Peppermint OS 7 respin, Bodhi Linux 4.1.0, Ubuntu Mate 16.10, Zorin OS 12 beta and Black Lab Linux.
I restored Grub by booting into Peppermint OS 7 on a flash drive and running Boot-Repair for Grub2.

I first installed the beta without an internet connection. It installed without a problem. Linux Lite was not an option in Grub when I rebooted.
I tried the install again while connected to the internet. I received the error below.

"The 'grub-efi-amd64-signed' package failed to install into /target/. Without the GRUB bootloader, the installed system will not boot".
I have 6 other Ubuntu based distros on this PC that installed and run without a problem. They are Ubuntu 16.04, Peppermint OS 7 respin, Bodhi Linux 4.1.0, Ubuntu Mate 16.10, Zorin OS 12 beta and Black Lab Linux.
I restored Grub by booting into Peppermint OS 7 on a flash drive and running Boot-Repair for Grub2.


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