New laboratories dedicated to innovative lighting works
Lighting needs at home, in public places and in industry are different. There is an appropriate type of light for each activity. The quantity and quality of light can even have an impact on our comfort and health. This is why manufacturers, specifiers and users need to know the photometric characteristics of light bulbs and fittings. But that is not enough. The performance of the system as a whole is passed under a fine-toothed comb: power supply, light fitting, management and gradation system. The objective is thus to optimise applications. CSTB is studying setting up a certification on these products to make a distinction between them and to reassure users and clients, at a time when energy savings are primordial. Remember that electrical expenditure for lighting represents 20% of world electricity consumption.
Apart from making assessments of innovative products for manufacturers, these laboratories are also designed for research. CSTB’s lighting team works particularly on Characterisation of Integration and Durability of LED Lighting Devices in buildings (the CITADEL project) to get a better evaluation of these new light sources. Furthermore, a study is currently being made for AFSSET on the biological safety of LEDs, to verify that they are not harmful to the eye.
Photometric measurements in integrating spheres to quantify and qualify artificial light
Dynamic measurement of the light efficiency of lighting systems
The light efficiency of a lighting fixture is a determining factor in the choice of an energy-efficient light. We evaluate complete light systems (lamp, optics, ballast, management system) when switching on, during gradation, colour variation phases, etc., through long term monitoring of electrical powers, the flux output from the light fitting and the light chromatic coordinates.
CSTB’s test bench is composed of a 3-meter integrating sphere, a voltage stabiliser, a parameter setting and measurement system (current, voltage, cos Φ) and a system for acquisition of photometric characteristics of the light fitting. Large light fittings can also be evaluated due to the size of the sphere.
Characterisation of sensors for intelligent lighting systems
Infrared thermography camera
Thermography has many applications, particularly for buildings and lighting of indoor and outdoor spaces; temperature measurements of light fittings and their electronic systems, the thermal map of the environment of light fittings integrated into the structure, displays of scenes detected by sensors are a few examples of how this infrared camera can be used.
CSTB lighting experts use the video-luminance-meter to make luminance, contrast and intensity measurements on light sources in laboratory, and in situ diagnostics in the context of public lighting studies, or building accesses, and to direct persons with impaired vision or other pathologies.