"Bright fluorescence = good CPL." Nope. There may or may not be a correlation. When working with instruments like the OLIS CPL Solo, the system measures both the total emission and the differential polarized emission. glum does NOT depend on total fluorescence is low — as long as S/N is adequate.

CPL intensity (ΔI) scales with fluorescence intensity (I_tot), but the dissymmetry (g_lum) reflects the intrinsic chiral emission properties — not brightness.

An accidentally acquired experiment proves this point brilliantly. Ask for details!