Short arc source allows for good optical control in floodlighting luminaires .

短弧光源，在泛关照明中，有良好的光学控制。

High mounted floodlighting is preferred for security because the higher a fixture is mounted the more an area is illuminated .

高安装泛光灯是出于安全方面的首选，因为高一夹具安装的更多的是面积照明。