We know that aside from Kryptonite, red solar energy is also a weakness to Kryptonians, as it replaces the "more energetic" yellow solar energy in their cells, robbing them of their powers. We've seen this put to deadly effect before, like when humanity turned their own sun red:
But what about the effects of redshifting? That is for example, if Superman were to fly away from the sun at around 1/6th the speed of light, then the yellow light would be shifted into red, and theoretically rob him of his powers. Or, in the situation above, assuming he flew towards the sun at that speed, it would appear yellow again, theoretically charging him.
Have any stories touched on this property of light as a weakness, either unintentionally or as exploited by a villain? For the sake of it, I'll even accept if there's anything that shows Superman to be weaker at sunset, when refraction causes the relative proportion of red light to be significantly higher.
Answer
The DCAU had an episode like this. The episode Solar Power had a villain use satellites to filter the yellow wavelengths out, leaving only red.
Superman appears to save Lois but finds himself unable to handle the trolley's weight. As he struggles to hold it up, Lytener appears floating beside him in a specialized suit, now calling himself Luminus. He says that things will only get worse. Superman barely manages to save Lois, after which he tests his powers, and finds that they are still fading. The clouds part and much to Superman's surprise, the sky is red.
Scientists explain that Lytener has hijacked an array of LexCorp satellites and used them to project a force field over the Earth; the sun is still yellow, but only the red rays are getting through the field, effectively making a red sun like that of Krypton. Lois calls up Luthor and accuses him of being an accomplice to Lytener's plan but he calmly denies it.
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