Cumulative ionising luminosities of the hot luminous stars in 30 Dor a) and the R136 region b). Feedback from all stars (black), W-R and Of/WN stars (red) and OB stars (blue). Solid lines include the feedback from stars which were spectroscopically classified as hot and luminous (Sp) while dashed lines include feedback from photometrically classified stars (Sp+Ph).