A comparison of lighting technology

Spotlights, floodlights and wallwashers are flexible and efficient lighting tools for the effective presentation of products. The quality of lighting technology is not only decisive for the precise distribution of light and an appealing shopping experience, but also for the long-term cost-efficiency of the lighting installation.
Luminaires are efficient if the energy deployed reaches the target plane in the form of light. For this reason ERCO uses individually arranged LEDs and an in-house developed lens system consisting of collimators and interchangeable Spherolit lenses. Conventional optical systems however consist of chip-on-board (COB) LED modules and a reflector. Here several LEDs are arranged below a phosphor layer and form a large luminous surface. Not all light beams can be directed with this construction—this creates spill light (the red lines). The result - the optical system has less efficiency and precision.

With light control via reflectors, only the light rays emitted to the side are controlled. Therefore very narrow light beams are not possible. Furthermore, high spill light losses (red lines) or not clean beams (e.g. halos) occur. Unfocused and sometimes coloured edges to the light beams may also occur as well as a non-uniform distribution of illumination in the centre.

Summary
ERCO lens wallwashers enable uniform vertical lighting with wide spacing between the luminaires. Despite the spill light component, a higher number of wallwashers with conventional LED reflector technology is needed to achieve comparable uniformity and illuminance.

Fazit
Die präzise Spherolitlinsentechnologie ermöglicht eine Akzentuierung mit hoher Effizienz (lx/W). Die in Licht umgewandelte Energie wird auf die Zielfläche projiziert und entweicht nicht als Streulicht unkontrolliert in den Raum.

non-interchangeable optics
Luminaires 5

Lenses -

Professional shop window lighting requires individual light distributions. If the displays change it is also recommended to modify the light beam.

non-interchangeable optics
Luminaires 5

Lenses -


With interchangeable lenses the light distribution is simply modified via accessories. With non-interchangeable reflector optics however, a higher invest of five further luminaires is needed.

non-interchangeable optics
Luminaires 5

Lenses -

Each further seasonal change in the displays again requires high investments if non-interchangeable lenses are used. The ERCO interchangeable lenses offer an economical alternative in such cases.



Summary
Interchangeable lenses cut the investment costs for flexible shop window lighting with changing displays. No further luminaires need be purchased if the displays are changed, but only the lenses as accessories.