do aerial roots avoid light?

[early]

Originally Posted by Roberta

Quite a few orchids also will grow a set of roots that point upwards ("bird's nest roots)

I have a mini phal that has what appears to be roots that are growing upward. They are whiteish with a healthy looking green tip. I have been trying to decided it the two are stems which would delight me and bloom, or just some strange roots.
Any ideas?
I now have 25 plants, seedling Vandas growing very slowly.
I even begged back a couple that I had given away in the spring, after they finished blooming. It is the same mini phal, which I loved. When I realized I had given two of my favorites away, I thought no problem, I will just order one, but discovered they are not to be found in US, and only shipper is from somewhere in Asia. So I am hoping to get several of my orchids blooming by fall winter and spring.