How do you say hello sunshine in French?

There's no direct translation for "hello sunshine" in French that carries the same affectionate and playful tone. However, here are a few options depending on the context:

Formal:

* Bonjour, soleil! (Good morning, sun!) - This is the most literal translation, but sounds a bit stiff.

* Bonne journée, soleil! (Good day, sun!) - This is a bit more natural and friendly.

Informal:

* Coucou, soleil! (Hi, sun!) - This is very casual and playful.

* Salut, soleil! (Hello, sun!) - This is a bit more neutral than "Coucou".

* Salut, mon soleil! (Hello, my sunshine!) - This is very affectionate and endearing.

More poetic options:

* Bonjour, rayon de soleil! (Good morning, ray of sunshine!)

* Oh, soleil, tu es si beau! (Oh, sun, you are so beautiful!)

The best option will depend on the specific situation and your relationship with the person you're addressing.