Just want to add an important point here
You wont see any disco ball effect with the Mitras. The reason for this is in the reflectors (not lenses) The reflectors converge the LED output to a uniform spread (convergence) eliminating any hot spot or higher intensity spot.
98% of the LED output is reflected back into the water matching that of a T5 reflector.
The Mitras was developed along with a leading University in Germany over two years, so there are a number of cutting edge technologies employed.
This spectrum analysis against ATi 54W T5 is quite impressive
The light blue thin line is the ATi