Why is it so bright #2 Traditional Cache

This is # 2 in this series of caches for me. Those of you that found #1 will recognize it!  Ah light! This is a park area so be mindful of muggles.

This is a log only cache and be sure to bring a pencil. If you get stumped, have a seat at the picnic table and maybe it will enlighten you.  When you do find it just twist and sign.