that's an intersting question it really involves weather or not light is effected by velocity at all or is it just a rule of the universe that light is restrained to one speed or not I'm sure theres somebody out there that works in this field that could maybe answer the question with factual science.

What is the speed of dark? If there is is real darkness at all?  Is there such a thing as true darkness- the absence of the entire electro magnetic spectrum. What would that be like? Absolute zero, no radiation at all?

From the Wikipedia-
Faster-than-light observations and experiments
Main article: Faster-than-light
See also: Scharnhorst effect and Hartman effect
There are situations in which it may seem that matter, energy, or information travels at speeds greater than c, but they do not. For example, if a laser beam is swept quickly across a distant object, the spot of light can move faster than c, but the only physical entities that are moving are the laser and its emitted light, which travels at the speed c from the laser to the various positions of the spot. The movement of the spot will be delayed after the laser is moved because of the time it takes light to get to the distant object from the laser. Similarly, a shadow projected onto a distant object can be made to move faster than c.[37] In neither case does any matter or information travel faster than light.[38]
In some interpretations of quantum mechanics, certain quantum effects may seem to be transmitted faster than c—and thus instantaneously in some frame—as in the EPR paradox. An example involves the quantum states of two particles that can be entangled. Until either of the particles is observed, they exist in a superposition of two quantum states. If the particles are separated and one particle's quantum state is observed, the other particle's quantum state is determined instantaneously (i.e., faster than light could travel from one particle to the other). However, it is impossible to control which quantum state the first particle will take on when it is observed, so information cannot be transmitted in this manner.[38][39]
Another prediction of faster-than-light speeds occurs for quantum tunnelling and is called the Hartman effect.[40][41] However, no information can be sent using this effect.[42]
The rate of change in the distance between two objects in a frame of reference with respect to which both are moving (their closing speed) may have a value in excess of c. However, this does not represent the speed of any single object as measured in a single inertial frame.
So-called superluminal motion is seen in certain astronomical objects,[43] such as the relativistic jets of radio galaxies and quasars. However, these jets are not moving at speeds in excess of the speed of light: the apparent superluminal motion is a projection effect caused by objects moving near the speed of light and approaching Earth at a small angle to the line of sight: since the light which was emitted when the jet was farther away took longer to reach the Earth, the time between two successive observations corresponds to a longer time between the instants at which the light rays were emitted.[44]
[edit]Galaxies moving faster than light
See also: Metric expansion of space and Hubble's law
In models of the expanding universe, the farther galaxies are from each other, the faster they drift apart. This receding is not due to motion through space, but rather to the expansion of space itself.[38] For example, galaxies far away from Earth appear to be moving away from the Earth with a speed proportional to their distances. Beyond a boundary called the Hubble sphere, this apparent recessional velocity becomes greater than the speed of light.[45]

i WONDER? HMM if you where traveling at the speed of light and pissed into the wind would the piss stream go as fast as a piss stream goes or would it go as fast as a piss stream goes+the speed of light? hmmmm -cough" HMMMMM