Upcoming Event

What is a lumen, really?
Presented by: Sri Rahm, Senior Lighting Application Specialist - GE


Lighting engineers and designers routinely use lumens and foot candles without a real understanding of how these units are derived or measured. Sri Rahm of GE’s Lighting Institute at Nela Park will lead a discussion of human attempts to define “quantity of light” and show the uncertainties associated with numbers. He will also discuss factors that contribute to a perception of brightness in a space that impacts practical lighting design.


Our speaker, Sri Rahm, M.S. (Physics), M.B.A., LC is a Senior Lighting Application Specialist and instructor at GE’s Lighting Institute at Nela Park, Cleveland, Ohio. He has worked in the Industry for over 35 years and served on several committees of the IES.


  • When: Thursday, May 17, 2018

  • Registration & lunch buffet: 11:30 a.m.

  • Program: 12:00 p.m. – 1:00 p.m.

  • Sponsor: GE

  • Location: Hilton Garden Inn
    1100 Carnegie Ave Cleveland Ohio 44113

  • Cost: $30

  • RSVP by: Wednesday, May 16


Pay by check or cash at the event, or by credit card using PayPal below.


IES May 2018


Mike Confer, Blue Streak: Treasurer