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Webinar: How D4i and Zhaga Book 20 can help you win the L-Prize: Materials now available

UPDATE: Materials and recording now available

>> Download the presentation materials
>> View the webinar recording (YouTube) or see below


The L-Prize, announced by the US Department of Energy (DOE), rewards data-rich, upgradeable luminaires based on D4i, DALI-2 and Zhaga Book 20. Details will be explained in a webinar hosted by the DALI Alliance and Zhaga on August 19.

August 17, 2021

The L-Prize, a lighting competition announced by the US Department of Energy (DOE), has a prize fund of up to $12.2 million. Luminaires designed in compliance with D4i, DALI-2 or Zhaga Book 20 will be rewarded with extra points during the evaluation process.

Details will be explained in an upcoming webinar:


  • Gabe Arnold, Senior Engineer, Pacific Northwest National Laboratory (PNNL)
  • Scott Wade, Technical & Certification Manager, DALI Alliance
  • Adrian Green, Chair Zhaga Working Group Book 20, Amphenol
Date: Thursday 19th August
Time: 11:00 am Eastern Daylight Time, 5:00 pm European Summer Time

“DALI-based luminaires align very well with the L-Prize requirements,” said Paul Drosihn, DALI Alliance General Manager. “In addition to D4i, DALI enables white-tunable capability, standardized dimming, energy reporting, occupancy sensing and many other features specifically referenced in the L-Prize rules.”

Luminaires submitted for the Concept Phase, which has a submission date of November 19, 2021, will be evaluated according to a number of topics including quality of light, connectivity, product life cycle and more.

One topic is standardized power and data connections, enabling sensors and other devices to be added to the luminaire. 

One point will be awarded for luminaires/systems that include standardized power, data, and sensor capabilities in compliance with D4i or ANSI C137.4.

A further point will be awarded for luminaires that incorporate a standardized sensor port and power/data connections in compliance with Zhaga Book 20 (which is based on D4i).

>> Download our press release

  • "L-Prize awards points for use of D4i and Zhaga Book 20": July 2021


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