A method of experimenting on aquatic life in an indoor facility and lighting assembly for accomplishing the same. The lighting assembly includes a lighting device that emits light at a predetermined wavelength that provides a minimum water penetration depth and is positioned in a manner to provide uniform lighting at the air and water interface within a containment unit housing the aquatic life. The on and off function are also controlled by the lighting assembly to provide a gradual turn on and off to prevent interference of effects of lighting with experimental results.

A method for feeding larval fish in an artificial habitat having a water level, includes the step of providing in the habitat a plurality of light sources at a plurality of three dimensional locations in the habitat and below the water level. Inanimate food particles are placed into the water. The plurality of lights are pulsed at the plurality of three dimensional locations intermittently to illuminate the food particles from a variety of different angles within the habitat. A system for feeding fish, a habitat for fish, and a larval fish food are also disclosed.

A method of experimenting on aquatic life in an indoor facility and a lighting assembly for accomplishing the same. The lighting assembly includes a lighting device that emits light at a predetermined wavelength that provides a minimum water penetration depth and is positioned in a manner to provide uniform lighting at the air and water interface within a containment unit housing the aquatic life. The on and off functions are also controlled by the lighting assembly to provide a gradual turn on and turn off to prevent interference of effects of lighting with experimental results.

A LIGHTING DEVICE for illuminating an aquarium (100), comprising: a base layer (111, 611); a plurality of lighting elements (111, 112, 113, 212, 213) mounted on the base layer (111, 611) and comprising a first and a second subset (630A) of lighting elements (111, 112, 113, 212, 213) arranged for emitting a first and a second spectrum of light respectively; a light transmission affecting device arranged for affecting the transmission of light from the plurality of lighting elements (111, 112, 113, 212, 213); wherein the light transmission affecting device is arranged for passing (420) at least a part of the light from at least one lighting element (112, 212, 213, 312) of the first subset (112) having the first emitting spectrum and processing (430) the light from at least one lighting element (112, 212, 213, 312) of the second subset (630A) having the second emitting spectrum; wherein the first emitting spectrum comprises white light or a first colored light; wherein the first colored light comprises wavelength in a first range with peak wavelength below (485) 485 nm; and the second emitting spectrum comprises a second colored light; wherein the second colored light comprises wavelength in a second range with a peak wavelength larger than 485 nm.

An aquarium system includes an aquarium tank arrangement and a light source. The light source has a controllable output of colored light projecting into the aquarium tank arrangement. The light source can provide a cycle of projecting light of at least two different colors.

An aquarium system includes an aquarium tank arrangement and a light source. The light source has a controllable output of colored light projecting into the aquarium tank arrangement. The light source can provide a cycle of projecting light of at least two different colors.

A lighting unit for illuminating a habitat is provided. The lighting unit includes a housing and a light emitter. The operating parameters of the lighting unit may be adjusted to mimic different natural conditions.