Dick and I took a walk this evening to see the "Garden d'Lights" at the Bellevue Botanical Gardens. It was great!! Such a cute and clever use of the lights. It was unlike anything I've seen. Highly recommend to my Eastside and Seattle friends.
We had a great time, and got in some steps (4 miles) to boot.
Pro tip: we went early to avoid the crowds. They open at 4:30 (because it's Dec and already dark!) Also, I think certain weeknights are free.