1st image has no lights. Its a simple global illumination render (sky and indirect lighting are checked off and are at 100%) where the atmosphere does all the "work"... And I did check, the shader settings on the 3rd were made even lower after seeing the glow show up from the default settings of the shader.

Actually, in the 1st image, I used the calm water for gi from the presets browser, and the 3rd is a slight variation of it. The 2nd uses turbulant water for gi, no adjustments...

There are 3 kinds of people in the world. Those that can count, and those that can't..