The HydroLight radiative transfer numerical model computes radiance distributions and related quantities (irradiances, reflectances, diffuse attenuation functions, etc.) in any water body.

After Curtis Mobley, the developer of HydroLight, retired from Sequoia in December 2016, HydroLight became a product of Numerical Optics, Ltd. and is managed by Dr. John Hedley.  For further information, licensing, and user support please contact Numerical Optics at https://www.numopt.com/