tem. It ranges from . 1, the threshold for circadian system activation, to . 7, which is response saturation. The participants wore their Daysi- meter for seven consecutive days dur- ing data collection periods in both the summer and winter months from 2014 to 2016. The LRC collected data on their sleep and mood using five standardized questionnaires. Partic- ipants also kept a log of bedtimes and wake times, sleep latency, quality of sleep, and any naps taken. The researchers found that office workers receiving a morning CS of at least . 3 (electric lighting and/or day- light) showed greater circadian en- trainment, were able to fall asleep more quickly at bedtime (an effect more pronounced in winter than sum- mer), and experienced better-quality sleep than those receiving a morning CS of . 15 or less. They also reported lower levels of stress with no seasonal variation. At bedtime, participants who received low CS lay in bed ap- proximately 45 minutes before falling asleep. While receiving high CS in the morning is hypothetically the most beneficial for entrainment, partici- pants receiving high CS throughout the entire workday (8:00 a.m. to 5:00 p.m.) experienced better sleep quality and felt less depressed compared with those receiving low CS. “Our study shows that exposure to high CS during the day, particularly in the morning, is associated with better overall sleep quality and mood scores than exposure to low CS,” Figueiro said in an LRC press release. “The present results are a first step toward promoting the adoption of new, more meaningful metrics for field research, providing new ways to measure and quantify circadian-effective light.” ;
, LC, principal of Zing Com-
munications ( zinginc.com), is a lighting
industry journalist, analyst, marketing
consultant, and author. Reach him at
Aug. 17 • the
ELEC TRICAL DISTRIBUTOR
To better help electrical distributors respond to the needs of
electrical contractors, “Contractor Q&A” features remarks
from real contractors from around the country. Here, Dean
Kredit, co-owner and president of K2 Electric in Phoenix, and
Jodi Holland, co-owner of Holland Brothers Electric in Newark,
Ohio, answer the question:
DO YOUR DISTRIBUTORS OFFER SALES PROMOTIONS,
AND IF SO, WHICH DO YOU FIND THE MOST APPEALING,
INTERESTING, OR EFFECTIVE?
What we find most effective, especially when com-
panies use our past purchasing history, is to raise the bogey
so that they achieve more sales from us. In return, we receive
greater discounts and, in some cases, free [gifts]—such as
trips to Hawaii and tickets for football, basketball, and baseball
We spend about $4 million annually on materials—a number
that has been increasing over the years—and while we do not
expect anything in return, if they are doing a promotion, we
would more than likely spend more money with that company
than somebody else as long as the prices were good. Most of
the time the promotions are for all contractors. In our case, we
buy a lot of light fixtures, panels, transformers, and wire and
conduit, and in addition to vacations, sometimes we receive
camping equipment or items that they know we would like.
Over the years we’ve noticed that suppliers are making a big-
ger effort in customer loyalty initiatives and we appreciate that.
It brings us closer together and has benefits for both sides.
Our local distributors do not offer a regular promotion
of products; they may have a yearly contractor appreciation day,
but that’s about it. We get a few deals on products, but not many.
We do receive deals by email and mail, but the distributors are
not local and there are warranty issues to consider.
Overall, while we may not enjoy regular sales from our local
distributorships, they do offer really good service and make it
easy to replace defective parts, so we prefer to buy locally. We’re
a local family business that has been here for many years and
we have good relationships with distributors. ;
Send your questions to “tED” Editor Misty Byers at firstname.lastname@example.org.
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