Distribution of the luminous efficiency τ in percent for different density assumptions: (a) ρ = 500 kg m⁻³; (b) ρ = 1000 kg m⁻³; (c) ρ = 1500 kg m⁻³; (d) ρ = 2000 kg m⁻³; (e) ρ = 2500 kg m⁻³; (f) ρ = 3000 kg m⁻³; (g) ρ = 3500 kg m⁻³; (h) ρ = 4000 kg m⁻³; (i) ρ = 4500 kg m⁻³. τ is plotted against the events corresponding pre-atmospheric meteoroid’s mass with a fit through the data in log-log space. These results were obtained from the dataset of 288 objects. Blue dots: values of τ; green dash-dotted line: weighted least squares fit (WLS) applied to the data, the method weights the values by the relative error of the value; red dotted line: the results found by Čapek et al. (2019); orange loosely dashed line: the results found by Subasinghe & Campbell-Brown (2018).