A container having a multiplicity of cans therein. A first module and a second module is defined such that if the first module is an optical module, the second module is a printer module and if the first module is a printer module, the second module is an optical module. Induction of angiogenesis by the described methods also will be useful in inducingenhancing radiosesitivity in some solid tumors. The clamping collars are each formed from several collar segments, each extending partially around the circumference of the pole with adjacent collar segments being attached to one another. The light mixing member has anisotropic diffusing elements that diffuse incident lights from the light-emitting diodes in a specific plane to effect light mixing.