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  3. It is said that good lighting can often be helped in promoting safety and se

It is said that good lighting can often be helped in promoting safety and se

游客2023-10-18  42
问题     It is said that good lighting can often be helped in promoting safety and security. While bad lighting is not helpful, and may badly compromise the intended goals for which the lighting was designed and installed.
    Does outdoor nighttime lighting prevent crime? The answer is nobody knows. In some cases, lighting seems to deter crime and it makes people feel more secure, but in reality they may be just as secure without the lighting. In some cases, lighting probably increases crime because it draws attempt to a house or business that would otherwise escape attention. Most crimes, violent and otherwise, take place during the day. After all, criminals need light to do their work, too. A dusk-to-dawn light shining all night in a rural area probably is an inducement for robbery and vandalism. A passerby might not otherwise notice the farmhouse is ever there.
    An infrared motion-sensor security light which comes on only when someone steps into the beam makes a lot of sense. It is only on when needed, thereby conserving energy. Its sudden illumination serves to frighten away the criminal. These lights are now beginning to replace some of the all-night dust-to-dawn 175 watt mercury vapor lights. This makes good sense from the economical, environmental, and crime prevention points of view. The motion-sensor security lights can cause light pollution and light trespass if too high a wattage spotlight is used, or if they are not aimed down toward the ground. They should also have some shielding. Do street lights, parking lot lights, and security lights prevent crime? Maybe yes, maybe no.【F1】If they are overly bright with much glare, they actually make it easier for a criminal to hide in the deep shadows produced by objects in the harsh glary light and encourage crime rather than discourage it. Well-lit streets with even, uniform lighting, low glare, and utilizing fully-shielded fixtures probably have lower vehicle and pedestrian accident rates. How about bright lights in a parking lot? How many people do you know whose car has been broken into during the day, or while directly underneath a light at night?【F2】One speaker at a recent lighting symposium recounted how his car was robbed at a local mall. It sat near a store entrance and was directly under a bright light! [br] A motion-sensor security light is more preferable in all the following ways except that______.
选项 A、it saves energy
B、it causes less pollution
C、it’s on when needed
D、it may frighten the criminal away
答案 B
解析
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