Research Project Information

Research Project Summary Information

Occusmart Lighting Demonstration (ST7133-1)

LaMar Lighting Company, Inc.


LaMar Lighting developed the Occusmart motion sensing bi-level lighting system with NYSERDA under NYSERDA contract #6581. This fluorescent lighting fixture incorporates an internal ultra-sonic motion sensor and bi-level ballast to offer energy savings in stairwells and other seldom used areas. The principal idea behind this product is to address unnecessary energy consumption without compromising tenant safety in commercial and high-rise residential building stairwells. The Occusmart system is intended to provide a low standby (10%) light level , which offers both safety and security, while simultaneously offering the building owner energy savings. Typically stairwells are the least occupied space in a building, yet stairwells are constantly illuminated. Upon detection of motion in the stairwell, the Occusmart system immediately increases the lighting to full brightness and, after occupancy is no longer detected, the fixture reverts back to the standby 10% level.

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Project Description

The objective of the project was to demonstrate and evaluate the energy and demand savings of the Occusmart lighting system in stairwells. Estimates of annual energy and demand savings were made by comparing pre-and post-installation metered lighting energy consumption in the stairwells, and pre- and post-installation measurements of brightness were also taken. Occusmart fixtures were installed in the stairwells of a commercial office building in New York City and in a multi-family residential building on Roosevelt Island, NY. Both cases used a 24-foot 32 watt lamp Occusmart fixture controlled by bi-level electronic ballast.


The Occusmart technology allows multi-story building owners and operators to reduce the amount of energy used to illuminate stairwells when the stairwells are unoccupied.

Project Results

Evaluations of the two case studies found that occupancy in staircases was less than 2% and, as a result, ballasts were operating at the standby level 98% of the time. When the standby light level was set at 33% (as in the residential building case), the energy savings were 53%. And when lamps were dimmed to 10% output (as in the commercial office building case), energy savings were 77%. The Occusmart luminaires increased illuminances in both cases while saving energy, and the building occupants all reported positive reactions to the new lighting. The results of the two case studies were documented by the Rensselaer Polytechnic Institute's Lighting Research Center (LRC) in a Field Test Demonstration and Evaluation of Lighting Technologies and Applications (DELTA) publication, and distributed broadly to New York lighting decision makers. The DELTA publication was also be made available online at the LRC Web site for free download by New York residents.


LaMar Lighting Company, Inc.
485 Smith St
Farmingdale, NY 11735

Principle Investigator

Jeffrey Goldstein

Universities Involved

Rensselaer Polytechnic Institute


Project Type:

Product Demonstration

Technologies Types:

Building Systems

NYSERDA Contact Information

Marsha Walton


R&D - Buildings Research

Contract Details

Start Date: 1/11/2010
Project Status: Active
Contract Number: ST7133-1

Last Updated: 3/7/2012 4