This paper presents selected results from the first stage of DAYKE (Daylight Knowledge in Europe), a 3-phase project that investigates the knowledge on daylighting in buildings among both architecture students and practitioners across Europe. The data presented are based on subjective judgments from 561 students from 8 architecture universities and schools in the EU, collected through two surveys in 2018. The key findings were: (i) variations in the spatial distribution of comfort and mood in the classrooms were observed depending on sky conditions and distance from windows; (ii) the average daylight factor DFm showed a good agreement with subjective judgments on the amount of daylight in a space: daylit spaces with highest DFm values were rated with the best scores; (iii) experts and non-experts provided similar judgments on the perception of a daylit environment; a general lack of knowledge about daylighting metrics, regulations, assessment tools and software was highlighted; furthermore a difficulty in implementing daylighting into the design practice was also identified.