The lights of the Oceanside Pier are probably the brightest out of any of the piers. I've actually surf here a few times at night under the pier lights. It's a little scary and I remember stepping on fish or something and freaking out. Actually when I was doing photos here this night I was in knee high water and while walking back into shore I kicked a sting ray or sand shark or something. Glad I didn't get stung or my next week would have been ruined.
As the water pulls back the wet sand almost ats as a mirror. You can see the reflection of the pier and the lights almost perfectly. It's a pretty cool place to do some HDR night photography.