Comparison of R and L with external data. Δ is defined as (FLAME−literature)/literature. Top: comparison of radii as a function of (a) radius and (b) T_eff, for asteroseismic and interferometric targets. The symbols indicate different literature sources: red squares are Vrard et al. (2016); green triangles are Chaplin et al. (2014); blue stars are Boyajian et al. (2013) and Ligi et al. (2016); black stars are Creevey et al. (2017); black triangles are members of NGC 6819 from Basu et al. (2011). Bottom: comparison of (c) FLAME luminosities with those from Casagrande et al. (2011) and (d) FLAME radii with those from Bourges et al. (2017). The blue circles are the subsample of stars used to estimate BC_{G ⊙} (see Appendix D). The open black circles are other stars not fulfilling the stricter criteria for this estimate.