Editorial: Asking questions

Kruithof AA . Tubular luminescence lamps for general illumination. Philips Technical Review 1941; 6: 65–73.

Fotios S . A revised Kruithof graph based on empirical data. Leukos 2017; 13: 3–17.

Commission Internationale De L’Éclairage. Guidance Towards Best Practice In Psychophysical Procedures Used When Measuring Relative Spatial Brightness. CIE 212:2014. Vienna: CIE, 2014

Harford T . How To Make the World Add up. London: The Bridge Street Press, 2020: 261.

Fotios S . Review of a published article. Leukos 2016; 12: 173–177.

Daneels R Van de Perre L Meuret Y Ryckaert WR . Reading comfort in relation to monitor and ambient luminance levels: a study using continuous rating scale and paired comparison methodology. Lighting Research and Technology 2024; 56: 866–885.

Martinsons C Behar-Cohen F Bergen T , et al. Reconsidering the spectral distribution of light: Do people perceive watts or photons? Lighting Research and Technology 2024; 56: 886–899.

Boyce P Cuttle C Durante A Kelly K Raynham P . Correspondence: What do we mean by spatial brightness? Lighting Research and Technology 2024; 56: 900–901.