Comparison of the mass-loss rates and luminosity of WC and WO stars in different metallicity environments to the mass-loss relation WR1 of Yoon & Langer (2005). The solid black line represents the relation for Z = Z_⊙, the dashed black line Z = 1/2   Z_⊙, and the solid red line Z = 1/7   Z_⊙. The solid symbols represent the results from Sander et al. (2012), the open symbols represent the results from Crowther et al. (2000, 2002), and the red square indicates the location of DR1.