Pots: transparent vs opaque

[Viperalus]

At a website that sales orchids in Europe I have read that it is preferable the pots to be transparent in order for the roots to get benefit from the light. And that when an orchids stays a lot in an opaque pot will start growing the roots upwards in order to avoid the dark environment of an opaque pot.

I never thought about this issue to play a significant role in the propagation of an orchid and now that I am thinking about it I think that it should be right. In the wild orchids' roots also are exposed to the light and air.

Kept enclosed inside a pot at least I think it would be better if I give them the opportunity to grow with more light reaching their roots.

What do you say about it?