4.11.3 All control apparatus for waterjet system, lighting and wiper control shall use luminous witches / push buttons and have high illumination for night operation. The illumination f all switches / push buttons shall be filament lamp or LED.4.11.4 The front side of all switches / push buttons shall be of diameter 32 mm. All switches /push buttons shall be snap-action switching element and rated 250 V a.c. and 10A.4.11.5 The water jet system control buttons that require access by standing operator shall be located at the right hand side of the console. Windscreen wiper and lighting control that equire infrequent access shall be located at the left hand side of the console.