Then you also need sunlight. The sky needs to be clear and the setting sun needs to be in the right position for its golden glow to hit the falling water.
And obviously the photographer needs to be there at the right time in the right place.
Absolutely fascinating. And I didn’t know about that until I read what others had to say about it on Flickr. When you search for ‘horsetail firefall’ there you can also see how others have approached the same phenomenon.
I think I know when I’m going next February.
Image: Horsetail Firefall© Daleberts via Flickr, used under CC licence