Apparatus and methods to prevent biofouling

An apparatus for reducing biofouling in a marine environment, comprising:

• a housing including a cavity and an ultraviolet transparent window disposed over the cavity;
• an optical device disposed in the cavity and directed towards the ultraviolet transparent window;
• one or more ultraviolet light emitting diodes disposed in the cavity and directed toward the ultraviolet transparent window;
• and
• a controller operably coupled to the one or more ultraviolet light emitting diodes and configured to provide at least one lamp power function to the one or more ultraviolet light emitting diodes, wherein the at least one lamp power function is based on at least a flash power value, a flash duration, a rest power value and a rest duration.

An apparatus, comprising:

• a housing means including a cavity configured to enclose one or more optical device means and one or more ultraviolet light emitting means;
• an ultraviolet transparent window means disposed on the housing means over the cavity, wherein the one or more optical device means and the one or more ultraviolet light emitting means are directed towards the ultraviolet transparent window means;
• and
• a controller means operably coupled to the one or more ultraviolet light emitting means and configured to provide at least one lamp power function to the one or more ultraviolet light emitting means, wherein the at least one lamp power function is based on at least a flash power value, a flash duration, a rest power value and a rest duration.