Thebox...

A distance is a distance, is a distance, no matter if it is a yard, meter, mile, or light year...

A speed is a speed, is a speed, no matter what type of distance it is measured against.

And... a speed can only be measured in relation to the amount of 'time' that it takes a particular 'speed' to cover a given 'distance'...

I think the phenomenon that you 'may' be attempting to illuminate is this:

It happens that the constancy of the speed of light in a vacuum, takes exactly 1 second, as measured by a 'stationary clock', to travel 1 meter...

Under the remit of GR, and also proven in experiment, a stationary clock placed 1 meter higher in elevation to another stationary clock situated at ground level, will run a fraction of a second 'faster'! (see NIST ground level relativity experiments 2010)

This is given as further proof of GR, and of GR's remit of a gravitational field 'slowing' the rate that a clock will run at...

Therefore, by definition, a light source that radiates away from Earth by 1 meter 'distance' at the 'speed' of light, will take this, 'observed by experiment', small fraction of a second (as measured by the clock at ground level) less 'time' to cover the next elevated distance of a meter, and so on...

This rendering the measuring of space by the means of light years, in terms of the speed of light in relation to the distance of a meter, perhaps just a tad complicated, maybe,

...and is a contributing factor in GR's description of the curvature of space.

However, if we were to measure the distance of an elevation from Earth, of 2 meters, via a 2 meter meter stick with a mark exactly in the middle, and we were then to measure this distance via the speed of light per second, this being a second as measured by the clock on the ground, we would then find that our 1st meter would be of the normal meter length, but from the halfway mark, our second meter would measure up a fraction shorter than the entirety of our 2 meter meter stick.... Without including the fact of the fraction of a second that the clock elevated at 1 meter is running faster than the ground level clock at, within the equation, the second meter of distance will appear to be shorter...

Is this along the lines of what you are talking about box?