L1 as a function of some parameters of the host GCs. From left to right: central velocity dispersion, King (1962) model central concentration, central luminosity brightness, and central luminosity density (top), core and half mass relaxation time, GC ellipticity, and logarithm of Galactocentric distance (middle), frequency of binaries, and fraction of binaries in the core, in the region between the core and the half-mass radius, and outside the half-mass radius (bottom). σ _v is given in km s ⁻¹, μ _V in V magnitude per square arcsecond, τ _c and τ _h in years, and R _GC in kpc.