Ads
related to: onforu motion activated led flood light catalogue 2 pack instructions
Search results
Results From The WOW.Com Content Network
These types differ in how the system is activated. With a passive system, the pedestrian activates the device merely by walking up to the crosswalk. This is accomplished by using one of several motion detection devices. These include microwave, motion sensors, video detection, pressure plates, or a light trip beam. [3]
A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.
The most common type of floodlight was the metal-halide lamp, which emits a bright white light (typically 75–100 lumens/Watt). Sodium-vapor lamps are also commonly used for sporting events, as they have a very high lumen to watt ratio (typically 80–140 lumens/Watt), making them a cost-effective choice when certain lux levels must be provided. [4]
Drawing up a comprehensive list of words in English is important as a reference when learning a language as it will show the equivalent words you need to learn in the other language to achieve fluency.
The Catalog began as a series of hardcover books known as The American Film Institute Catalog of Motion Pictures, published by the University of California Press (excluding vol. A) from 1971 to 1993. [1] [4] The print version comprises seven volumes documenting all films produced in the United States from 1892 to 1970. [2]