My favorite biking wear of all (aside from wool base layers, mind you) is stuff from Brooks- their "Nightlife" line. I get it from various places, but Terry carries a lot of their stuff.
At any given time on my bike, I am wearing Screaming fluorescent yellow on my Nightlife long tights, capri's, vest, jacket, t-shirts, and/or longsleeve jerseys. I wear them in unlimited combos.
For instance, I might on a cool day wear the NightLife long tights with my favorite regular black chamois shorts over them, then a black Smartwool longsleeve hoodie and my Nightlife vest over that. Or an Ibex wool base layer and a Nightlife LS jersey over that.
On a hot day I often wear just a screaming yellow lightweight t-shirt over my regular biking bottoms. On really hot days I wear either a Nightlife yellow t-shirt that I cut the sleeves off of- OR the Nightlife racer back tank with shelf bra....can't get cooler than that!

I'm a big screamingyellow/wool combo fan girl.