A light emitting apparatus including a phosphor blend including two or more phosphors to provide an emission spectrum simulating the spectral power distribution of a CIE reference illuminant across at least a certain spectral range. The invention based on the recognition of actual utilization of transport resources. The class parameters for each of the classes are adapted to a data set in an adaptation algorithm in which class parameters including mixing matrices and bias vectors are adapted. Yet another aspect of the present invention involves the use of an alcohol vapor having a flash point from about 15 C. Electrodes within the flow cell may be formed of materials having a catalytic effect upon the electroionic reactions within the flow cell. An article is included comprising a matrix polymer and an intercalated clay comprising clay intercalated with polyether block polyamide copolymer.