By Craig DiLouie
Complex lighting fixtures Controls is edited by means of Craig DiLouie and written for engineers, architects, lighting fixtures designers, electric contractors, vendors, and construction proprietors and bosses. complex lighting fixtures controls, indicated by means of examine because the "next massive thing," at the moment are mandated through the ASHRAE/IES 91.1-1999 power usual, the root for all country strength codes within the united states, and have gotten the norm instead of the exception in new development. This publication offers in-depth information regarding the main traits, applied sciences, codes, and layout thoughts shaping using today's lights keep an eye on structures, together with dimming, computerized switching, and worldwide in addition to own keep watch over.
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Additional resources for Advanced Lighting Controls: Energy Savings, Productivity, Technology and Applications
Installation requirements. Units that are easy to install will reduce costs and improve the return on investment. • Appearance. When sensors are visible, they should be attractive enough to help assure acceptability by occupants of the building. Photocells Photocell controls respond to changes in ambient light. When the ambient light level falls to a user-determined level, lighting is switched on. When the ambient light increases to a user-determined level, lighting is switched off. Insofar as outdoor safety and security are concerned, a photocell control is superior to a time control because it can respond to overcast 24 Advanced Lighting Controls conditions during daylight hours.
For example, consider a metal-halide lighting system. Restrike time, which refers to the time it takes a lamp to begin giving off light after being turned on, is crucial for this type of system. Once metal-halides are shut off, they take several minutes to begin giving off light again after being turned back on. If all of your lamps are metal-halide and you shut them off at night, you’ll wait 15 min. for a reasonable level of light when you turn them on the next day. By adding other types of light, as well as dedicating certain fixtures to an “always on” configuration, you can reduce the effect of the restrike time.
Power-line Carrier Controls Power-line carrier control systems create an alternative to extensive re-wiring in retrofit or the installation of control wiring in new construction. These systems rely on small receivers installed inside luminaires to control ballast operation. Transmitters send coded command signals to these receivers over existing electrical wiring. Some of the transmitters are wallmounted and look much like conventional wall switches; others are centrally located. Most power-line carrier ballast loadswitching systems are centralized and use toggle switches or simiFigure 1-10.