There is a large open-plan office hall for general normal office work with dimensions of 12m x 8m x 3.65 m (LxWxH), and height of desks in the room is 0.8 m. Reflectances of the ceiling, walls and floor are 0.7, 0.5 and 0.2 respectively, and there is no window in the room. 12 m Not to scale 8 m I Suggest suitable values for the following items: (a) minimum illumination level, (b) minimum lighting uniformity value and (c) maximum allowable glare rating, for a general lighting system to be installed in the office hall.