Accretion vs. stellar luminosity for the objects with a disk in the Chamaeleon I star-forming region. Red stars are used for objects surrounded by a full disk, and circles for transition disks. Empty symbols are used for objects with low accretion, as described in Sect. 3.3. Lines of equal L_acc/L_⋆ from 1, to 0.1, to 0.01 are labeled. The best fit with a single linear fit or a segmented line is shown. For the former, the 1σ deviation around the best fit is also reported.