Light, whether sunlight or artificial is essential to every architectural design. There is no separating them.
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-I'm there to fullfill his/her imagination.
And a brilliant job you did here. The orange glow of the highway complements the blue of the architectural object which is faintly replicated in a dramatic sky. Well done, well seen, well captured, and well processed.
I doubt that I will ever perceive the colors IRL as they are represented here, but that doesn't make the picture any less competent, and I suppose it is a bit like selling soap: artificially clean surfaces sell better. In that respect I agree that removing the sign, poles, and other distractions is better.
But I still maintain that the sign makes a brilliant statement. It would be a bit like this: looking at the picture I see a beautiful and clean, strongly colored scene, and the sign seems a bit out of character. So I am forced to wonder why the artist has left it in. I then "read" the sign, which says "no left turn" and "one way only" and realise that that is exactly what the elements in the picture represent.
The elements represent singular directions, with a single destination, much like what human society (represented by the urban setting) imposes upon our daily lives. Then the sky shows natural forms with slight movement in a direction of its own choosing, which alludes to our inner nature of freedom and creativity that every person possesses.
Yes, indeed, I do write a crack'n artist's statement, no?