The C-2(a(3)Pi) + NO(X(2)Pi) --> CN (A(2)Pi, B(2)Sigma) + CO (X(1)Sigma) reaction is studied in an HTP (high-temperature photochemistry) reactor. C-2 is produced by the 193 nm multiphoton photolysis of C2Cl4. The CN (B-X) (0,0) and (1,1) chemiluminescence is used as the diagnostic. The C-2 consumption rate coefficients are measured under pseudo-first-order conditions and are found to be independent of pressure in the 5-200 mbar domain. They yield k(292-968 K) = 4.3 x 10(-11) exp(89 K/T) cm(3) molecule(-1) s(-1) with a 2sigma precision limit of +/-5%. and a corresponding estimated accuracy limit of +/-20%. The slight negative activation energy is indicative of intermediate complex formation. The results are compared to the C-2 + NO measurements by Kruse and Roth for the 3150-3950 K temperature range and confirm that a mechanism change occurs between the two respective temperature ranges. In the present work, under otherwise constant conditions the CN(B-X) emission intensity increases with bath gas Ar pressure in the 5 to 100 mbar domain and decreases with further Ar addition. This increase in CN(B) population is likely, at least in part, due not only to collision-induced internal conversion from CN A and X state molecules, but also collision-induced intersystem crossing from CN quartet state molecules.