Back in 1835, the first constant electric light was demonstrated; the ...
I was in a very nice restaurant the other evening, and ...
Light-emitting diodes are not a particularly new technology. Affordable LEDs have ...
We seem to live in a world where technology changes weekly; ...
IAEI May-June 2012 ...
Question Are there LED retrofits for emergency lighting? Are two light ...
Question Does UL List (certify) powered suspended ceiling grids that power ...
It had been raining and the sidewalk was wet. This had ...
This article discusses issues that can come up when billboard signs ...
Editor’s Note: this article first appeared in the Spring 2010 issue ...