Indagine sulle condizioni di illuminazione dei prodotti alimentari nei punti vendita della grande distribuzione organizzata

A survey of the light sources was carried out in 10 different large-scale retail stores around Milan, noting the typology of the lamps used in the different sections. For each light source the irradiance in the UVA region (Wm-2) and illuminance (lux) were also measured at the level of different foods. The survey showed that 72% of the total light sources was represented by fluorescent lamps and 22% by halogen lamps. The remaining 6% was represented by a combination of both. Among the fluorescent lamps it was possible to distinguish the light sources as a function of the colour temperature and emission spectra of the lamps. The analysis of the principal components (PCA) was used to find a relationship between the lamps and their use in the lighting of different food categories. The first two principal components made it possible to distinguish foods as function of the typology of the lamps. The most widely recorded illuminance values ranged from 1000 to 3000 lux and UVA irradiance values from 0 to 20 mWm-2. 2007.