This month, we will explore the role that energy-saving lighting controls play at the Cleveland Public Library Rice Branch, a new building that achieved a LEED Silver rating. Photography by David Joseph. Control manufacturers/products: Lutron Electronics’ Quantum, EcoSystem, Sivoia Shading Solutions, GRAFIK Eye QS. Lighting control design by Tec Inc Engineering & Design.
Multiple control strategies were implemented into the design of this new construction urban public library. At 14,000 sq ft, it became the first freestanding public library in the state to achieve a LEED Silver rating.
Direct-indirect luminaires float gracefully within the open space providing just the right amount of illumination to meet the targeted goals. Photosensors are integrated into the luminaire and wired back to DALI ballasts.
The lighting control plan shows the openness of the space and the minimized amount of circuits needed. The DALI system separates the control from the power, making the installation more flexible for the changing needs of the collection over time.
The one-line diagram illustrates the full system of strategies combined on this project, including: daylight harvesting, occupancy sensing, scene control and automated shading.
Ballast tuning was employed in the soft seating areas where a reduced footcandle level was desired. With a high-end trim set to 65% the LPD went 1.13 down to 1.06. This amounts to a savings of 19% compared to energy code 90.1-2004.
Highlighting the area seen above showcases the need for varied lighting levels over multiple task types within continuous linear runs of luminaires.
A close-up of the plan indicates the desired light levels of both the daylight harvesting and tuning. Without the DALI system, this would have proved a challenging wiring project for the Electrical Contractor.
Lighting controls were located at the main circulation desk and were also tied to an astronomical timeclock that could be triggered at each entry door for unexpected after-hours staff.
Full scene control was implemented into the meeting space seen here, with shades fully open for maximum daylight contribution.
An evening scene showcases the seamless integration of the varied light levels without detracting from the overall appearance of the space.
Got a project? Criteria for the new award, along with submissions forms and procedures, can be viewed at www.IES.org/programs/ia.cfm.