Underwater lighting assembly

A control system for controlling a plurality of LEDs installed on a board in a housing of an underwater lighting assembly, comprising:

• a power supply;
• a non-board programmable controller for generating, in response to switching of the power supply between on and off states, operating signals for a predefined portion of a timing cycle;
• and
• a plurality of switching transistors, the switching transistors interposed between the plurality of LEDs and said controller;
• wherein said plurality of LEDs are arranged on said board in a plurality of banks and powered by the power supply, each of the banks having a group of LEDs being allocated for a different color;
• the controller is operative to simultaneously fade at least a first color up in intensity and a second color down in intensity to continuously provide a constant light intensity of varying colors;
• the controller is further operative, when an off state of the power supply is sensed, to provide at least a third color upon a switching on of the power supply.

A control system for controlling a plurality of LEDs installed on a board in a housing of an underwater lighting assembly, comprising:

• a power supply that cycles between on and off states;
• a non-board programmable controller for generating operating signals for a predefined portion of a timing cycle;
• and
• a plurality of switching transistors, the switching transistors interposed between the plurality of LEDs and said controller;
• wherein said plurality of LEDs are powered by the power supply and are arranged on said board in three banks, each of the banks having a plurality of LEDs being allocated for a different color;
• wherein the controller is programmed to switch the transistors in response to the cycling of the power supply.

A method for controlling colors emitted from an underwater lighting assembly, said underwater lighting assembly having a housing and a plurality of LEDs mounted on a board within the housing arranged in first, second and third banks, said first, second and third banks operative to emit first, second and third colors, respectively, the method comprising the steps of:

• cycling a power supply to the LEDs between on and off states to generate a sequencing signal;
• selecting the first color by turning on a first switching transistor connected to the first bank of color;
• simultaneously turning off a transistor connected to the second bank and a third transistor associated with the third bank;
• after a first predetermined time, selecting the second color by turning on the second transistor, turning off the first transistor and keeping a third transistor off for the predetermined time;
• after a second predetermined time, selecting the third color by turning off the second transistor, keeping the first transistor off and turning on the third transistor;
• and
• maintaining an overall light intensity of the underwater lighting assembly by simultaneously fading the intensity of at least the first color up and the intensity of at least the second color down;
• wherein the selecting steps are performed by a controller in response to the sequencing signal.