22. PLAYING CONDITIONS
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22.1 Space. The minimum playing space for each table should be at least
12 m. (40 ft.) long, 6 m. (20 ft.) wide and 3.5 m. (11.5 ft.) high.
22.2 Light. Measured at table height, the light shall be at least 400 lux
(38 foot candles) in strength uniformly over the table and not less than
half of the table strength over any other part of the playing area (ITTF
requires 1000 lux - 95 foot candles).
22.3 Flooring. The floor should be made of hard, non-slippery wood. Stone,
concrete, linoleum, tile, etc. are not recommended.
22.4 The light source shall not be less than 3.5 m. above the floor.
22.5 The background shall be generally dark and shall not contain bright
light sources nor daylight through uncovered windows.
22.6 The floor shall not be light-colored nor brightly reflecting.