IES richard kelly grant – call for entries

Open to anyone 35 years or younger in North America, the Richard Kelly Grant seeks “…to recognize and encourage creative thought and activity in the use of light. Cash award(s) will be granted to the person(s) who preserve and carry

TM-30-15 color measurement standard

The IES has put forth a new color metric standard that is far more comprehensive then the old CRI (Ra) measurement system.  It will take time, but I hope manufacturers and specifiers alike adopt the new system. For a more