Burberry Brit might be nice. It's not entirely light, but has a refreshing lime note, and it's not too sweet.
Givenchy Extravagance d'Amarige is another nice citrusy scent, lighter than the Brit.
Green/hazel eyes, strawberryish blonde hair, medium, warmish, combination acne-prone skin. Everyday base face: tinted frankensunscreen, MAC Blot pressed powder in Medium, and Nars The Multiple in Malibu (bronzed rose).