field: Fields describe a single aspect of each member of a table. A student record, for instance, might contain a last name field, a first name field, a date of birth field and so on. All records have exactly the same structure, so they contain the same fields.
Many jurisdictions require one or more bicycle lights to be fitted to bicycles ridden at night â generally a white light in the front and a red light at the back.
Proper Positioning. Bicycle reflectors reflect the upper beam of a carâs headlamps. To ensure you are visible on the road at night, position your safety equipment properly. Rear reflectors, for example, should point straight back.Inspect all installations regularly, tightening loose screws that can cause reflectors to move out of place.t night, a reflector makes you visible from 500 feet way, giving a car going at 60 mph about twice the distance it needs to come to a stop. On the other hand, if you forgo reflectors and wear blue or black, you become noticeable at 55 feet of distance, allowing a driver less than one second to react after he sees you.