viewing distance

Expected Viewing distance of JALITE AAA Exit signs

Safety signs are designed to convey important information and warnings to individuals in various environments. The viewing distance for safety signs depends on several factors, including the size of the sign, the graphical symbol elements and their size within the shape of the safety sign, and the environment in which the sign is placed.

The expected viewing distance of a safety sign is described according to the Z factor. The Z factor is the ratio of the viewing distance divided by the sign height (graphical symbol height plus geometric shape according to ISO 7010 image) - Direct line of sight.

Viewing distance by sign size (millimeters) 100 Lux vertical illumination (meters)
(Z factor ISO 3864-1 = 170)		 5 Lux vertical illumination (meters)
(Z factor ISO 3864-1 = 170)
200 x 400 34 19
250 x 500 42.5 23.75
300 x 600 51 28.5
400 x 800 68 38

 

Viewing Distance 68mtr

Click here for more information on BS ISO 3864-1:2011

Click here for more information on BS EN ISO 7010:2020