Half the fun was kayaking in pitch dark, and seeing the water light up while rowing! And bumping into everyone 
Note; look deep into the water for fish...as they swim through they light up. So flipping cool!
I did the 5pm tour, so the way out was light and we were the first tour, the way back in was crowded and we were bumping into everyone. It definitely was fun!!
I enjoyed the 2hr kayak chill, the glow was cool, but was only for a short time. We had a great relaxing time.
The tour guides were funny too!