Secret of the Circle

My memories are cloudy, but I will tell you what I can. The circle of statues in the Sunken Temple, while dangerous, I believe that they hold the secret to unlock an even greater treasure. From the main altar, I was able to activate a series of lights. I think that if you can uncover what these lights mean, you might be able to unlock whatever secrets are hiding in this room. I warn you though, <name>. Great evil lies in the temple. It's likely that anything valuable will be fervently guarded...