Comparison plot for the two methods used to calculate the bolometric luminosity for the 30 HII regions in this sample, where for L_{bol,  IMF} we have assumed a fully sampled IMF, and for L_{bol,  SLUG} we have used the median of the posterior PDF returned by SLUG. The colours indicate the age of the regions, and the size of each point is a representation of their mass. The dashed black line indicates where these values are equivalent; points above this line show where L_{bol,  IMF} is greater than L_{bol,  SLUG} – that is to say, where assuming a fully sampled IMF with Eq. (2) overestimates the bolometric luminosity. The Leo P data point has been labelled for visual clarity.