Keep in mind that God created the light, therefore, He can make it go faster or slower if He so chooses. I DO NOT accept your implied assertion that the God is limited by the speed of light. That limitation is for earthly domain. This is also true for the law of conservation of energy. And this is validated by the verse:
19:67 - Did the human being forget that we created him already, and he was nothing?
Nothing is not equal to energy. Therefore, your hypothesis is false.
Yes, God is all-powerful but consider what all-powerful means within the limits of our reality. For instance, the limits of our reality say that there is no such thing as a square circle. Do you know why there is no such thing as a "square circle"? Because "a square circle" is not a truthful phrase, it is evident falsehood, it is like saying 2+2=5. God created the universe this way, not ANY OTHER way. So stick to reality, follow the quran in 30:8 if you claim to believe. However, God could have created the universe in a different way in which the speed of light as we percieve is different. However that is a different universe. In fact, the only thing that would be different is the proportioning of that particular universe.
God is not "limited by the speed of light", God IS the light (24:35, 24:35, see 24:35, if you haven't seen 24:35 then you will be perpetually blind). Rather, we are limited by the speed of light, God is what limits US, no limits can we place on the One who created us. Now when I say light, I am not talking about merely the visible spectrum but rather, information/truth
; this is "light" in the truest sense of the quranic word. Light mediates every single interaction and is the rate limiting step in EVERY single interaction (consider 8:17). Additionally, you do not grasp what the speed of light is. While we think of it as merely "299,792,458m/s" which implies that there is such a thing as "299,792,459
m/s" (there is NOT), the definition of a meter is indeed the reverse of that. For all intents and purposes, the "speed of light" is INFINITE to us (look up rapidity
). If you throw a human into a nuclear reactor and transform him into pure energy then perhaps he can travel as fast as god. Of course, then he is no longer anything worth mentioning, you sure as hell are not going to define those photons as a "human".
If you check out the equations of special relativity, you will notice that light occupies the most powerful position concievable to us (and far beyond). We can Lorentz transform from the perspective of massive objects (creation) to other massive objects but there is no such transform to the "point of view" of a photon. That is to say, they operate outside of time, you can think of them as having a start and end point but they do not "travel" in any sense. Indeed, photons are what actually mediate time and hence "speed". In addition, nothing created (i.e. mass) can travel faster than the speed of truth. In such a way, Einstein's famous equation of E=(m0c^2)^2+(pc)^2 is equivalent to saying that God is the greatest.
Please keep your mind within the same rational reality that it operates in, we know nothing else and nor can we ever. If you wish to rely on "God" as some unfalsifiable entity, you will never have certainty in faith, there will always be doubt in your mind and there is good reason for that, unfalsifiable entities have no credibility or power whatsoever to do anything, they are idols. Yet the quran points out many examples of signs of God in the universe, all of them are falsifiable.
Yet again, there was no such thing as a "human being" prior to our existence. The total amount of energy assigned by God to "human beings" prior to our existence is a grand total of... zero. When you keep in mind that God is the light of the universe, you only need to open your eyes to be reminded of his eternal presence (and for those who intend to use their god given brains, they only need to remember that they exist), there is no thinking "God is nowhere to be seen so I'm cool, let me transgress" because God is EVERYWHERE to be seen, you really cannot run away from this dude, even in the most literal way. The faster you run away from God, the harder it gets for you!