Lighting test - flashing lights

Flashing lights are used in horror to create tension and anxiety, which makes a horror atmosphere more effective. Using Dead Space (2008) as a means of inspiration I have created a lighting test demonstrating a single flashing light in a dark room.

At the beginning of Dead Space the player has a moment of panic as the main character Isaac and his team are suddenly attacked and the player must run through a series of hallways to evade these unknown hostile creatures (necromorphs). I found a video walkthrough online to visually display this section of the game in order to highlight this test. The moment in which this happens is at 07:24. Beware that this video contains some strong language.

After seeing this video I decided to make my own flashing light test. I started by creating a mesh in the shape of an everyday rectangular light. The next step was to add a touch of transparency to depict the plastic frame of the light and so that the light could be more visibly clear. This was when I ran into a very frustrating technical problem. Originally, I key framed an number of volume lights in three places within the mesh at different intensities, but nothing was happening. The key frames were there but the light remained at the same intensity and was not flashing at all.

After hours and hours of searching online for answers to this dilemma, it became clear the solution to my problem involved nothing more than a right click. It was a very simple fix but I felt like I had just wasted a lot of time for such an easy solution. The solution was to right click on the intensity of each light and hit 'set key' instead of using the manual keyboard short-cut. With this technical error solved, I then continued keying the intensity of each volume light to a specific pattern until I had the lighting effect I desired. Once this was finished I conducted a batch render so that I could load the complete piece into Adobe Premiere Pro. With the completed piece rendered and loaded into the necessary video editing software, I brought all the rendered frames into one full piece and exported it. Below is the finished lighting test.

What relevance does this test have to the development of my project and horror?
This lighting test helps me understand how to promote horror with animated lighting because flashing lights evoke feelings of uncertainty, panic and anxiety thus, creating a more effective atmosphere. In Dead Space this lighting technique made me feel like there was something watching me or something bad was about to happen, creating a very high tensioned atmosphere, successfully inspiring feelings of fear and terror which is the central aim of the horror genre.