![]() Besides patients, doctors and care staff often spend long periods in the hospital. As a result, patients fall asleep more easily and regeneration during sleep is improved, as though under natural conditions with sufficient exposure to daylight. 5000 – 10000 lux/h per day vertically at head level is considered a reference value for an adequate supply of light. They adjust the illuminance and colour temperature to the level required to create a natural hormone and performance curve. This can be prevented by circadian light sequences. įor patients who have little or no outdoor exposure during their hospital stay, the light dose is insufficient to keep their internal clock set. Special sensor-controlled luminaires can be easily programmed and create dynamic, natural lighting conditions that also reduce energy consumption. An automatic light control system dynamically adjusts the brightness to the time of day. To save energy, the light intensity may be dimmed down to 50 lux at night. Since corridors and staircases in the hospital are used around the clock, they are also illuminated at night. To correspond to the natural hormone release of the human organism, cool white light colours up to 5700 K are well suited in the morning, while very warm white colour temperatures of ≥ 2700 K should predominate at night. For older persons, significantly higher cylindrical illuminance levels are necessary for a biological effect. This corresponds to about 370 lux at head position for a 32-year-old observer. During the day, a melanopic and day-equivalent illuminance of ≥ 250 MEDI lux is recommended. The biological standard specifications for the lighting of hospital corridors and staircases are set out in DIN SPEC 67600. In high-ceilinged rooms, large suspended luminaires with direct/indirect light components are a good choice for pleasant illumination. Vertical illumination, or brightening of the walls, is another option as it visually enlarges the room. If they are not mounted centrally above the workstation but to the left and right of it, they ensure good visibility without distracting reflections. The correct positioning of the luminaires is therefore crucial. The lighting in the examination room should not create glare or reflection points on computer screens. This protects the eyes during strenuous visual tasks. As in daylight, there is a lot of light blue radiation which adapts the pupil size as it would in nature. XAL's new full-spectrum LEDs offer an excellent colour rendering of Ra 97, with almost natural-frequency wavelengths. The high colour fidelity enables physicians to differentiate the finest colour nuances on a patient's skin. EN 12464-1 standard specifications of 1000 lux with a uniformity of U0 ≥ 0.7 and a colour rendering value of Ra ≥ 90 apply. However, care must be taken not to dazzle a patient looking at the ceiling. Direct lighting around the examination couch ensures optimal lighting conditions. Indirect lighting is pleasant and relaxing as it makes the room appear larger. Ĭeiling luminaires with a combination of direct and indirect light are suitable for general lighting. ![]() DIN SPEC 67600 recommends a cylindrical illuminance of ≥ 250 MEDI lux for at least four hours during the mornings at the head position of a 32-year-old patient. Especially after a period of artificial deep sleep or a coma, patients can find their way back into their natural circadian rhythm more quickly and regenerate both physically and psychologically. This improves awareness activity, enhances memory, and stabilises the day/night rhythm. As a result, the patients’ physiological performance curve follows its natural rhythm, despite staying in the room all day. Different light colours and illuminance levels create a special, biologically effective light pattern, based on the dynamics of daylight outdoors. This requires sufficient illuminance to reach the patient's eye. To best support recovery, lighting should be synchronised with the patient's internal clock. For nursing procedures, illuminance should be at least 300 lux at the examination level. They help patients navigate while also providing caregivers with sufficient light for routine checks. Orientation light and night lighting are particularly important since patients are in an unfamiliar environment. The light emission direction prevents patients in neighbouring beds from being disturbed. Small reading lights are mandatory for each hospital bed, which must reach at least 300 lux at the reading position. ![]()
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