Start of the Semester Fun

The spring semester starts this week for my Pratt students and next week for my Parsons students.  The beginning of the semester is always a little hectic and stressful.  Here’s a bit of fun to take the edge off.  Not many forms of energy have their own song.  Here’s “Electricity” by Orchestral Manoeuvres In The Dark (aka OMD).  It’s so painfully dated that it’s funny.

DOE Presents LED Color Stability Webinar

On Tuesday, April 15, the U.S. Department of Energy’s (DOE) Solid-State Lighting Program will host a 60-minute live webinar entitled LED Color Stability: 10 Important Questions. The webinar will begin at 1:00 p.m. ET (10:00 a.m. PT) and will include a 45-minute presentation followed by a 15-minute question-and-answer session with attendees. IES continuing education credits will be offered.

The lumen maintenance lifetime of many LED products is 25,000 hours or more, but that doesn’t mean products are guaranteed to perform the same over that time. One thing that could change is the color of the light, or chromaticity. This webinar will examine the causes of color shift, and look at existing metrics used to describe color shift/color stability in LED lighting. Are there established tolerances for color shift? What current standards apply to the measurement of color shift, and are there plans for new methods and/or standards for projecting color shift in the future? Presenters Michael Royer of Pacific Northwest National Laboratory, Ralph Tuttle of Cree, and Chad Stalker of Philips Lighting will answer these questions and many others.

Click here to register.

March 21st Event

Next Friday, the 21st, I’ll be speaking at the 24th Annual Symposium on Public Monuments in New York City.  The symposium is on the legacy of the 19th century architect Patrick Charles Keely.  I’ll be speaking on my relighting of his Church of the Holy Innocents on 37th Street in Manhattan.  For more information, go to

Here’s what the church looks like today.

Church of the Holy Innocents
Church of the Holy Innocents