12.1.2.3-4 Task Area Luminance Ratios

To ensure effective visual performance, the task area luminance ratios in Table 12.2 should not be exceeded.

Additional Information:
To determine task lighting requirements, it is necessary to consider the levels of lighting that surround a task. Great disparities between task and background lighting can lead to adaptation problems.

Table_12.2

Table 12.2 Maximum task area luminance ratios.