This master's thesis deals with the search of commercially available luminance analysers and cameras that use the measurement of correlated colour temperature. It also deals with calculations of correlated colour temperature according to various available methods. The luminance analyser LDA-LumiDISP is based on a DSLR camera. The principle of its operation and possible errors in capturing pictures are discussed here. The work deals with extensive testing of the LDA-LumiDISP luminance analyser, which is primarily intended for measuring luminance in the set scene, but can also be used to measure the correlated colour temperature. The device is being tested in terms of measuring the correlated colour temperature in laboratory and field conditions. The result of the master's thesis is the calculation of measurements uncertainty for certain light sources and the optimization of the measuring algorithm to reduce them.

Syfte: Syftet med studien är att få en inblick i hur färgtemperaturen kan påverka personers trivsel i bostadsområden. Detta är för att få en förståelse om hur ljusets färgtemperatur påverkar personers trivsel, positiva eller negativa effekter och vilka skillnader som syns med det olika färgtemperaturerna. Metod: Två metoder användes i studien. Ett frågeformulär skapades med 8 självtagna bilder med tillhörande frågor. Efter att deltagarna svarat på enkäten, genomfördes intervjuer med fem deltagare som valdes ut genom hur det svarade på frågorna och fick utveckla sina svar. Resultat: Resultaten visar att det finns en skillnad mellan varmt och kallt ljus, i hur det påverkar trivseln. Hur det påverkar trivseln beror dock på vad deltagare anser själva är en trivsam belysning. Ur frågeformulär var det en stor variation av deltagare som kopplade låg färgtemperatur till komfort och hemlik atmosfär. Högre färgtemperaturer kopplades mer till trygghet och modernt ljus. Ur intervjuer visade resultatet att fler deltagare föredrar lägre färgtemperatur i bostadsområden, då det känns mer behagligt och mer passande. Färre antal föredrog högre färgtemperaturer och kopplade det till att det lyser upp mer av omgivningen och blev mer följsamt för ögat. Deltagare kopplade mycket till omgivningen då bilderna visade olika områden. Mycket hus, bilar, belysning ifrån hus och grönskan bidrog mycket till att deltagare valde bilderna och kopplade det till hus ljuset spred sig i omgivningen.  Konsekvenser: Studien ger kunskap om färgtemperaturens roll för utomhusbelysning och vikten av den. Detta gynnar boende och gående inom bostadsområden. Genom att veta vilken färgtemperatur som föredras, kan belysning projekteras och planerare kan skapa den belysning som befolkningen anser är nödvändig och trivs bäst med.  Begränsningar: Studien är begränsad till att undersöka endast färgtemperatur i bostadsområden. Intervjuer genomfördes på distans i digital plattform, med hänsyn till rådande situation av covid-19. / Purpose: The purpose of the study is to gain an insight into how colour temperature can affect people's well-being in residential areas. This is to gain an understanding of how the colour temperature of light can affect well-being, whether it affects positively or negatively, if there are differences and in what way it differs. Method: Two methods were used in the study. A questionnaire was created, with 8 self-taken pictures with additional questions. After the participants responded to the questionnaire, interviews were conducted with five participants who were choose by how they answered and were allowed to develop their answers. Findings: The question asked had a broad answer. The results show that there is a difference between low and high colour temperature, how it affects well-being. However, how it affects well-being depends on what the participants consider to be a pleasant lighting. From the questionnaire, there was a large variety of participants who linked low colour temperature to comfort and homely atmosphere. Higher colour temperatures were linked more to security and modern light. From interviews, the results showed that more participants prefer lower colour temperature in residential areas, as it feels more comfortable and more appropriate. Fewer numbers preferred higher colour temperatures and linked it to the fact that it lit up more of the surroundings and became more compliant to the eye. Participants connected a lot to the surroundings as the pictures showed different residential areas. The pictures included a lot of houses, cars, lighting from houses and greenery, which contributed a lot to participants choosing the pictures and linking it to how the light spread in the surroundings. Implications: Conducting a study entails knowledge within the role of colour temperature for outdoor lighting and the importance of having it. This benefits residents and pedestrians in residential areas, by knowing which colour temperature is preferred, lighting can be projected, and planners can create the lighting that the population considers necessary and are most comfortable with. Limitations: The study has mainly focused on the colour temperature in residential area. Interviews were conducted remotely on a digital platform, considering the prevailing situation of covid-19.

Compte tenu des évolutions technologiques et réglementaires actuelles, l’apparition de la technologie LED décuple lespossibilités de conception d’environnements lumineux adaptés aux attentes et besoins des usagers. Bien qu’ingénieurs etarchitectes accordent une importance croissante à la qualité de l’éclairage, peu d’éléments fondamentaux de l’environnementlumineux ont été scientifiquement identifiés au regard des attentes des clients dans le secteur de l’hôtellerie.Dans ce contexte, notre projet de recherche vise à mieux comprendre la perception des environnements lumineux de chambresd’hôtel du point de vue de l’usager, le client de l’hôtel lui-même. Nous faisons l’hypothèse que l’évaluation d’un environnementlumineux dépend à la fois des caractéristiques physiques de l’éclairage, de la situation dans laquelle il est perçu ainsi que descaractéristiques individuelles des usagers qui le perçoivent.Une méthodologie en trois phases a été construite pour tester cette hypothèse et accéder au jugement d’appréciation desusagers d’une chambre d’hôtel en situation réelle. La première phase de ce programme de recherche a permis de mettre enévidence l’importance que le client accorde à la lumière en fonction des situations d’usage qui ponctuent son séjour à l’hôtel,telles que la situation de détente ou de travail. La deuxième phase du programme a conduit à la sélection des paramètres del’éclairage pertinents dans la conception d’environnements lumineux de chambres d’hôtel, fondée sur les préférences de laclientèle. La troisième et dernière phase a permis de mesurer l’influence de la situation d’usage sur l’évaluation desenvironnements lumineux variables en termes de niveaux de lumière (30% et 100% du flux) et de températures de couleur(2700 K, 4200 K).Les résultats de cette étude ont montré que les environnements lumineux préférés des usagers sont caractérisés par une teintechaude et une faible quantité de lumière lors d’une situation de détente, contrairement à une situation de travail où une teintechaude et une forte quantité de lumière des environnements lumineux sont préférées. Des différences dans les caractéristiquesindividuelles, telles que le genre et l’âge, modulent les jugements d’appréciation.De plus, notre projet de recherche porte un enjeu méthodologique, celui de la construction d’un dispositif expérimentalpermettant la formulation et le recueil du jugement d’appréciation des usagers, relatif à l’environnement lumineux d’unechambre d’hôtel dans un contexte écologique. / Given the current changes in technologies and regulations, the emergence of LED technology multiplies the possibilities ofdesigning indoor and outdoor luminous environments adaptable to user’s needs and expectations. Although engineers andarchitects care about lighting quality, few fundamental elements of luminous environments have been evidenced as importantregarding customers’ expectations in the hospitality.In this context, our thesis aimed at better understanding the perception of light environments in hotel rooms from a users’perspective, the hotel customer itself. We assumed that the judgment of appreciation of a luminous environment depended onits lighting parameters, but also the situation during which the luminous environment was perceived and the individualcharacteristics of the users who perceived it.A three-step methodology was designed to test this hypothesis and to retrieve the judgment of appreciation of the users undera real situation in a hotel room. The first phase of this research program highlighted the importance attached by customers tolight depending on the activities undertaken during his/her stay, such as a situation of leisure or a situation of work. The secondenabled the selection of the relevant lighting parameters to design a luminous environment in a hotel room based oncustomers’ preferences. The third phase was set out to measure the influence of the situation on the assessment ofappreciation of luminous environments varying in terms of illuminance (30% of luminous flux vs 100%) and color temperature(2700K, 4200K).Overall, the users preferred the luminous environment characterized by warm white and dim light while relaxing, whereas theypreferred a warm white and bright light when working. Differences in individual characteristics like age and gender influencedthe assessment of appreciation.Moreover, the methodological issue of our project was to develop an experimental device allowing the formulation and thecollection of the users’ assessments of appreciation regarding luminous environments in a hotel room under an ecologicalcontext.

This thesis is focused on measuring the quality of lighting in operating rooms. Operating lights are very demanding in terms of quality requirements for each parameter, so it is important to specify exactly these parameters and check them regurarly. To measure the quality of the light source, was used a special kit from Maquet. Measurement procedure was not as accurate as it was for operating lighting need, therefore, this work includes a proposal to improve the measurement of quality lighting in operating theaters. In cooperation with University Hospital Brno Bohunice University Hospital Motol and the company Maquet measured nine operating lights, each light were compared in terms of parameters such as maximum light intensity, light distribution in the surgical field. In each category were selected several lighting, which reached the best results. The various parameters were compared with values declared by the manufacturer.

This thesis deals with luminance parameters measurement and ways to accomplish this using LabView software. The first part focuses on luminance parameters measurable by spectroradiometer and their meaning. Following part introduces reader to hardware equipment that is used in the measurement. Third part contains description of LabView software and explains what is required to make a communication between equipment and PC work. Next part explains how the communication with peripherals was achieved. Following up is the part where it is described how programs controlling AC and DC power supplies work. In this part the user interface is described.