The choice of luminaire will be driven by a number of factors. In high-quality office blocks, aesthetics will be a major factor, whereas in others practicality and durability will be of primary concern.
Extract from CIBSE: SLL Lighting Handbook 2018
|Space||Recommended maintained illuminance (lux)|
|General||100 lux on floor with uniformity 0.4|
|Basins and surrounding surface||200 lux|
|Toilet cubicles||100 lux horizontal at 0.6 m|
|Toilet cubicles for disabled users||200 lux horizontal at 0.8 m|
|Baby changing facilities||200 lux|