a. Today is a sunny day that we get a lot of sunshine.
b. Today is a sunny day that we get a lot of sunslight.
1. Are there any differences between the above sentences?
2. Are sunshine and sunlight interchangeable in the above situation?
3. Are sunshine and sunlight interchangeable in the all situations, if not, any examples?
Today it was very sunny and we got a lot of sun. -- I would say this if I thought I had a bit of a sunburn.
It's nice and sunny outside! Go out and get some sunlight!
It's nice and sunny outside! Go get into the sunshine!
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.