User blog comment:FairyTailFan7/Sting's Attacks Are Light Speed?/@comment-4933386-20150820120945

The speed of light is one of the fastest mechanism in the world with travelling at about 300 million metres per second. nothing can be that fast really.

I am 100% certain that Sting's magic is not that fast. You can see the holy light shooting towards Natsu. But in real time light will almost certain hit him if the speed of his light is the speed of light.

Let's say that Sting and Natsu is 100 metres apart (which should be even closer) the time it takes for the light to reach Natsu is 3.33 * 10^-7 seconds. It takes a super super super super fast reflex in order to avoid that; not even your nervous system can react that fast.

So therefore, Sting's light is not as fast as the speed of light.