I wasn't listening very carefully, but there was a segment on NPR radio this morning about a team of scientists who built a full size two-story wooden house on a "shake table" to study what happens when a simulated 6.5(?) quake occurs just a few miles away. The structure itself fared very well, but apparently the contents were strewn all over the place, including heavy appliances and furniture.

Anyway, just more confirmation that some form of light will likely be critical immediately after a large earthquake strikes in the middle of the night. All that stuff on the floor and rearranging of objects that will likely occur inside our homes will make it difficult to find things or even get around without some light.