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Have a ctl 171lx about this item? Table 2 describes the photometric measures used later in this paper; Figure 3 shows a typical digital camera image showing areas for which mean luminance was calculated.

There were 40 participants 20 male, 20 femaleranging in age from 18 ctl 171lx 59; all participants reported having normal or corrected-to-normal vision. Participants wore their own clothing, and were not given instructions on what to wear, except the general instruction that the day would be similar to normal office work. During the day the participants performed computer- and paper-based office tasks.

The tasks consisted of typing reports, ctl 171lx entering data into spreadsheets and databases. Each participant did similar work, but it was not standardized between participants.

Performance on this work was not scored, but it ensured that participants spent the day in a typical office experience, particularly with regard to visual targets. The initial instructions, including the signing of a consent form, and all breaks occurred in this space. After the researcher explained the dimming control, the participant started working at the initial level. They were told that ctl 171lx could only change this level when invited to by the researcher, which occurred every 30 minutes, beginning at The researcher took luminance photos in Room B just before and just after inviting the participant to choose their preferred dimming level. Breaks were scheduled from —and —in between invitations to use the dimmer and the associated measurements.

Lunch was scheduled from —and there were no dimming choices and associated measurements at and At the end of the day the participants completed a short questionnaire, which included items on how they used the controls, and on their satisfaction with various aspects of the indoor environment. There is a negative correlation between prevailing light levels and dimmer level choice. This hypothesis was supported, but the ctl 171lx of the best-fit regression line was not as steep as for ctl 171lx close-loop automatic controller.

This implies that, from ctl 171lx perspective of the occupant, glare-free daylighting can displace electric lighting. Ctl 171lx is good news for energy efficiency programs, and contradicts some prior research suggesting a preference for higher electric light levels in the presence of daylight.

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This hypothesis was not supported, illuminance actually measured on the desktop ctl 171lx a better predictor than any of the many luminance-based predictors we tried. However, there ctl 171lx be practical, luminance-based predictors that are as good as practical, desktop illuminance sensors. A camera-based luminance detection system may also be used for occupancy detection and safety purposes, though there are serious privacy concerns to be addressed for such applications. This further supports the assertion that occupants accept that daylighting displaces electric lighting. This finding also demonstrates that substantial energy savings are achievable with relatively simple manual control.

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The authors would like ctl 171lx extend their thanks to Roger Marchand and Chantal Arsenault for their technical development of the experimental space, and to Tina Chen and Sophie Boissard for their work on a pilot study that helped to refine the experiment described in this ctl 171lx. This work was part of a collaboration with Francis Rubinstein of Lawrence Berkeley National Laboratory, and we are also grateful to Steve Selkowitz for facilitating this collaboration.

We have also collaborated with Jens Christoffersen of the Danish Building Research Institute in the development of this ctl 171lx. Office workers believe quality of lighting affects productivity and creativity.


Steelcase Workplace Index Survey, 2 pages. The HWS is able to changes its appearance to coincide with the website that it is lx. Temple Ctl 171lx Special. I-ampasas, June Monday destroyed the home of Ruble Shanks in the depot geetion of Lampasas. It originated and Rain- ed such headway before anyone awakened that nothing na. ctl 171lx


Biirtiett, Tex.Buy CTL Lx 17 inch LCD Monitor: Black w/ Speakers Monitor ctl 171lx fast shipping and industry leading customer service. CTL Lx Black 17 with fast shipping and tax free at

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