BUILDINGS
Photo Analytical’s products can be used in various Lighting Solutions for Architecture. The lighting of storefronts, workspaces, facades, and sports venues, as well as emergency lighting in buildings.
What is measured in Lighting Solutions for Architecture applications?
INDOOR
The photometric evaluation of interiors regarding the absolute luminance level and the relative luminance distribution on illuminated surfaces is an important task in the architectural field. Determining visually perceived contrasts also serves as a measure of ergonomics for individual visual tasks. Using imaging luminance cameras, you can easily measure the following variables:
- Luminance and luminance distributions
- Dynamics of brightness and contrast ratios on indoor surfaces
- Derived perception criteria such as recognizability and the determination of ergonomic and safety aspects of workplaces
- Luminance uniformity on walls, floors, ceilings, and derived statements on the appearance of lighting as well as visual comfort
- Determination of light colors and color rendering of illuminated objects (gallery, museum, or store lighting)
Perceptual comfort – psychological glare
The combination with additional geometric information about the position and size of the light source enables the evaluation of further visual perception criteria. These include, among others, psychological glare. Using the UGR method for artificial light sources and the DGP method for daylight glare, for example, is possible.
These glare metrics utilize the luminance of the luminaires or the daylight as input variables. These are linked with the associated location information and ambient luminance. All necessary measurement data can be made available with only one HDR luminance measurement image.
Our solution
TechnoTeam has several LMK products that meet these requirements, offering advanced Lighting Solutions for Architecture. These are the LMK 6 models and the LMK mobile. In addition, TechnoTeam provides a software add-on for standardized evaluation according to the UGR method and the DGP evaluation method. This requires an LMK measurement system in combination with a wide-angle lens and a geometric calibration of the imaging properties.
EMERGENCY
Safety lighting: Light during power outages!
In the event of a power failure, emergency lighting activates to prevent potential hazards. There are three types of safety lighting: escape lighting, anti-panic lighting, initial lighting, and safety signs.
Backlit safety signs facilitate building evacuation after a general lighting failure by helping people to find their way around more quickly and to leave dangerous areas via escape routes. The characteristics of backlit safety signs are described and specified in DIN EN 1838.
Quality characteristics: Visibility, chromaticity, contrast
Measured quantities: Luminance, color coordinates, and luminance distribution
- Minimum luminance for safety color: 2 cd/m².
- Contrast ratio between min/max for safety color and contrast color < 10:1
- contrast between safety color and contrast color between 5:1 and 15:1
- in case of power failure, an illumination duration of at least 1 hour must be ensured
- Behavior after power failure min. 50% required luminance after 5 seconds and 100% required luminance after 60 seconds