|The following is based on Fallout: New Vegas cut content and has not been confirmed by canon sources.|
Let there be light! is a paper note cut from Fallout: New Vegas. It was meant to be given by Chomps Lewis to the Courier when speaking about the broken generator near the mining office, however since Lewis has no dialogue telling about the generator, there is no way to receive the note. Instead, the player needs to fix it by themselves, for a 25 XP reward when speaking to Lewis again.
The only appearance of the note in the game's coding is inside a script for the generator for removing the note, should the player own it.