I read the book, waiting for the movie.
What happened? Every alarm went off. Here’s why:
1. Lucifer means Light, the light bearer and the scriptures, 2 Corinthians 11:14,  tell us not to be deceived because Satan appears as an angel of  Light. 
The book “Let There Be Light” continually calls the reader to THE LIGHT… not Jesus Christ,  although Jesus Christ does get mentioned in a rough terrible way.
2. The book is heavy in Dominion theology,  Ecumenism, and Lordship Salvation.  There is no scripture, Bible reference given as a guide. It’s based on the Main Character’s personal experience.
3. The ending sent chills when light appears all over the world in not only 1 THOUSAND POINTS OF LIGHT BUT A MILLION POINTS OF LIGHT…
People wake up!  This Book and Movie, “LET THERE BE LIGHT” is building a false gospel preparing for the Antichrist NEW WORLD ORDER, BEAST system.
Please read these links:

What does 1,000 points of light mean?