For me, the first thing I thought of was the last two lines of my favourite poem, and then some of the sunflower photos I took back in the summer.
However, in the interests of creativity and originality, this is what I ended up with when I started scribbling after thinking about the word.
It looks more like the moon than the sun, I know. And demonstrates that I've been reading a lot of post-apocalyptic books recently as what came into my head was the recurring sun imagery in Ballard's The Drowned World (again...) and the novella I read this morning where an elderly man sits on a beach as the sun goes down, and tells the story of the end of civilisation. (The Scarlet Plague, by Jack London)
Gosh, that's a pretty miserable result from such a cheerful word! Sorry, and here's hoping for a sunshiney weekend.