Ultima 7 Create Light Cheat.

Run U7CHEAT.COM before starting Ultima 7 part 1 or 2.  Once you load your
game (ie. after the title screens), hit both shift keys to invoke light.
Hit them again to deactivate the cheat.

When you exit Ultima 7, you can remove the cheat from memory by running
U7CHEAT.COM again.

That is all.

Nelno the Amoeba