Histogram of Ψ = (M/L)_dyn/(M/L)_pop for the samples of Fig. 2. The (dashed) red histogram denotes high-mass UCDs with M > 10⁷ M_⊙. The green (solid) histogram denotes low-mass UCDs 2 × 10⁶ M_⊙ < M < 10⁷ M_⊙. The blue (solid) hostogram denotes globular clusters (M < 2 × 10⁶ M_⊙). The histogram for GCs is scaled down by a factor of 9 to fit the plot. The low Ψ peak of the green histogram is close to the peak of the blue (GC) sample. The shift of ~20% between those two peaks is expected from dynamical evolution (e.g. Baumgardt & Makino 2003; Kruijssen & Mieske 2009).