Top panel: duty-cycle in the radius ranges 1−2 R₀, 2−3 R₀, 1−3 R₀, and > 3 R₀ for a wind clump number distribution n ∝ R_c^{− α}. A value α ~ 5 represents a wind dominated by small clumps, whereas α₂ ~ 2.5 is an observational value for Wolf-Rayet (WR) stars; R₀ is the minimum clump size given by Eq. (1). Bottom panel: duty-cycle weighted by the effective section of the shock, and therefore its potential luminosity, shown in units of the luminosity L₀ produced in the interaction of one clump of R = R₀ with the jet. The case > 3 R₀ is not shown as it may imply jet disruption.