Asymmetric Vs Symmetric Floodlights

We look at the difference between asymmetric and symmetric floodlights, as well as the range of applications for each type.

What is the difference between asymmetric and symmetric floodlights?

Asymmetric floodlights use reflectors to direct light in front of the fixture where illuminance is required, compared with symmetrical floodlights which distribute light evenly in all directions. Asymmetric floodlights are superior in concentrating light where it is needed, compared with symmetric versions, which is achieved by using cutting edge lens technology which allows us to direct the beam to the selected area. This, in turn, allows asymmetric floodlights to achieve up to a 50% better output utilisation into the intended illuminated area.

Compared with symmetric floodlights, asymmetric versions provide lower indirect glare for those using the space, making them perfect for use in sports grounds.

The below graphic highlights the difference between the two versions of floodlights. Symmetrical floodlights illuminate the whole of the side of the building, and the ground in front of the lamp post. The light spill also includes having direct upward light and a proportion of backlight behind the lamp post.

Asymmetrical floodlights, on the other hand, only illuminate the area marked in the graphic between the two posts, marked ‘area to be lit.’ This type of floodlight concentrates the light to a specific area just in front of the floodlight, reducing any unwanted light spilling on to neighbouring properties, making it ideal for use in towns and cities.

Where would you use Asymmetric floodlights?

Asymmetric floodlights, with their lower light pollution benefit, are best suited in areas where light distribution and its effect on neighbours, is a consideration. They are ideal for installation in built-up areas, towns and cities and so are perfect for football pitches, tennis courts, construction sites, warehouses, loading bays and inner-city retail parks.

Where would you install symmetric floodlights?

Symmetric floodlights are more suited to large open spaces, where light affecting neighbouring properties isn’t an issue. They are ideal for illuminating large outdoor sports pitches and facilities, large building sites, outdoor storage facilities as well as open car parks.