candela

« Back to Glossary Index

[3.4.1] cd

The SI unit of luminous intensity. One candela is one lumen per steradian (lm/sr). Formerly, candle.

Note: The fundamental SI unit of luminous intensity is the candela.* The candela is the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. The candela so defined is the base unit applicable to photopic quantities, scotopic quantities, and quantities to be defined in the mesopic domain.

From 1909 until January 1, 1948, the unit of luminous intensity in the United States, as well as in France and Great Britain, was the international candle, which was maintained by a group of carbon-filament vacuum lamps. For the present unit as defined above, the internationally accepted term is candela. The difference between the candela and the old international candle is so small that only measurements of high precision are affected.**

From 1948 to 1979, the unit of luminous intensity was defined in terms of a complete (blackbody) radiator. From this relation Km and K’m, and consequently the lumen, were determined (see luminous flux). One candela was defined as the luminous intensity of 1/600,000 of one square meter of projected area of a blackbody radiator operating at the temperature of solidification of platinum and at a pressure of 101,325 newtons per square meter (N/m2, or Pa).

* Adopted at the Sixteenth Conference on Weights Measures on October 1, 1979.

** NBS Circular 459, Announcement of Changes in Electrical and Photometric Units. Washington DC: U.S. Department of Commerce; May 15, 1947.

« Back to Definitions Index

EP Zoom Platinum Sponsor - $20,000

What’s in it for you?

  •    Sponsor 5 Students/Emerging Professionals and the EP Day presentation platform
  •    Visibility and awareness before breakout rooms and throughout the event
  •    Opportunity to present a live or prerecorded personal closing message (15 seconds-1 minute duration)
  •    Shout-outs throughout the event
  •    Recognition as an EP Program Sponsor on all event communication
  •    Recognition on the IES Annual Conference homepage
  •    Recognition on the IES Annual Conference Emerging Professional homepage

EP Sponsorship Opportunities

Sponsor students and emerging professionals to attend the virtual Annual Conference event or the in-person Street & Area Lighting Conference. Student and EP recipients selected by Emerging Professional Committee.

EP Breakout Room Sponsor - $8,000

What do you get?

  •    Sponsor breakout room for live engagement and networking during EP Day
  •    Opportunity to present a live or prerecorded personal welcome message (15 seconds-1 minute duration)
  •    Visibility and awareness at the start of the schedule
  •    Personalized zoom backgrounds for moderators
  •    Recognition as an EP Program Sponsor on all event communication
  •    Recognition on the IES Annual Conference homepage
  •    Recognition on the IES Annual Conference Emerging Professional homepage
  •    Opportunity to provide personalized swag to attendees and moderators

EP Game Sponsor - $5,000

What are the benefits?

  •    Sponsor live interactive game session(s) during EP Day
  •    Ability to use your personal game hosting platform for the game session (IES can provide platform if needed)
  •    Be a Game Co-Host
  •    Opportunity to provide personalized swag or selection of IES publications as prize options

1 X Event Sponsor - $5,000

What’s in it for you?

  •    Visibility and awareness before breakout rooms and throughout the event – graphic image of logo
  •    Opportunity to submit a prerecorded personal opening/closing message (15 seconds-1 minute duration)
  •    Shout-outs throughout the event
  •    Recognition as a Leadership Forum Sponsor on all event communication
  •    Recognition on the Leadership Forum homepage

6 X Breakout Room Sponsor - $1,000 – (1 for each of 6 Breakout Rooms)

What do you get?

  •    Visibility and awareness at the start of the schedule – [verbal announcement/thank you]
  •    Personalized Zoom background for moderators – [moderators must use if provided by sponsor]
  •    Recognition as a Leadership Forum Sponsor on all event communication
  •    Recognition on the Leadership Forum homepage

3 X Leadership Forum Kahoot Game Sponsor - $500

What are the benefits?

  •    Sponsor live interactive Kahoot game session(s) during LF Day
  •    Be a Game Co-Host (optional)
  •    Recognition as a Leadership Forum Sponsor on all event communication
  •    Recognition on the Leadership Forum homepage

1x Gold Sponsor- $25,000

  •    Recognition as a Gold Sponsor in a fourth (1/4) page placement for 2 months in LD+A magazine
  •    Recognition as Gold sponsor on event app and all event communication, excluding Registration and Daily Digest communications
  •    Full registration for two (2) to the Annual Conference
  •    Company logo and hyperlink placed on exhibitor page within event app

2x Keynote Sponsor- $10,000

  •    2-3 minute Opening
  •    Introduce keynote speaker
  •    Company logo and hyperlink placed on exhibitor page within event app

5x Virtual Break Sponsor - $6,000

  •    Provided graphic visible during break duration
  •    Recognition as Virtual Break sponsor on event app and all event communications, excluding Registration and Daily Digest communications
  •    Full Registration for one (1) to the Annual Conference

1x Opening Session Sponsor- $5,000

  •    90-second video prior to session start
  •    Company logo and hyperlink placed on exhibitor page within event app

1x Closing Session Sponsor- $5,000

  •    90-second video prior to session start
  •    Company logo and hyperlink placed on exhibitor page within event app

1x Society Update Sponsor - $5,000

  •    Recognition as Society Update sponsor throughout web
  •    Recognition as Society Update sponsor on event app and all event communication, excluding Registration and Daily Digest communications
  •    Full registration for one (1) to attend the 2021 Annual Conference
  •    90-second video prior to session start

1x Registration Sponsor - $5,000

  •    Visibility as sole sponsor on the registration page and in all registration focused communications
  •    Company logo and hyperlink placed on exhibitor page within event app

1x Daily Digest Sponsor - $5,000

  •    Visibility as sole sponsor in all Daily Digest focused communications
  •    Recognition on event webpage and communications as Daily Digest Sponsor

10x Event App Exhibitor Page Sponsor - $1,000

  •    Company logo and hyperlink placed on exhibitor page within event app