This article is from the Table Tennis (Ping Pong) FAQ, by ttennis@bu.edu with numerous contributions by others.
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.
 
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