Apparatus, and systems for processing and treating a biological fluid with light

Apparatus for treating a biological fluid comprising:

• a fluid treatment chamber;
• first and second light sources emitting light within a selected range of wavelengths on opposite sides of said fluid treatment chamber;
• a tray adapted for placement within said fluid treatment chamber, said tray comprising a first compartment and a second compartment separated from said first compartment and said tray being made of a material capable of transmitting light emitted from at least one of said light sources in an amount effective for the treatment of said biological fluid.