This is what controls when your underwater light will turn on and off. The photoelectric eye collects light data from its environment, and determines when the sun has gone down and then triggers your underwater light to come on. Then in the morning when the sun rises, it shuts your underwater light off.

This is part of what makes the Underwater Fishing Light so appealing. It does all the work on its own. Once you have it installed and where you want it. Just sit back every night, and enjoy the show!

See Pictures Below!
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Side_View	This shows the photo eye for the Underwater Light. This is what triggers the underwater light to come on in at night, and turn off during the day.
Top_View	This is the top View of the Photo Cell for the underwater light. It mounts on the top of the Junction Box, and is protected from the elements by its hard plastic casing.
Bottom_View	This shows how the Photo Cell is attached to the Junction Box. You basically plug it into the top, and then twist it into place.