Barraz felt, deep in his heart, that there were no chances for him if he were hit by the singularity of light and darkness launched in his direction.
Light was naturally the enemy of every demon, as was his case. He had some resistance, depending on the power of the adversary manipulating light and how refined the enemy's element was.
In particular, in Hell, light was greatly restricted, with almost no places where the element could be found or even manipulated.
Even so, a little of the element was enough to make someone, even as strong as this Devil, fearful.
Light was not exactly a common element in the universe. That is, there were very few beings capable of following its path. So anyone able to do more than a 'trick' with the element would be regarded with great caution by negative beings. This alone would be enough to frighten Barraz in this situation.
