Plenitude is converting LED billboards to dark mode across Italy, Spain and France, cutting power draw by up to 74% and inviting other advertisers to follow.
LED billboards run hot. The brighter the pixel, the more current it draws — which means the white backgrounds, vivid skies, and sun-drenched product shots that dominate digital out-of-home advertising are also the most energy-intensive to display. Plenitude, the retail energy arm of Italian oil and gas group Eni, has decided to address that. As of mid-April, the company is converting all its LED creative across stores in Italy and DOOH placements in Italy, Spain and France to a dark-mode aesthetic: black and deep-toned backgrounds, with brand elements rendered in lower-luminance palettes.
The energy case is straightforward, and particularly urgent as the escalating conflict between the US and Iran continues to destabilize global oil markets and drive energy costs to record highs. Independent research from Certimac found that reducing average pixel luminance from 70% to 35% cuts power draw by approximately 74%. To scale the impact, Plenitude and agency LePub have released a platform that automatically converts brand assets to dark mode while preserving legibility, inviting other advertisers to use it.
TREND BITE
Sustainability messaging is moving out of the campaign and into the substrate. For years, brands signaled their climate credentials through dedicated initiatives — pledge ads, hero spots, capsule collections wrapped in shades of green. Plenitude's move points to a quieter alternative: the design itself carries the signal, every time the creative runs. There's no copy line about energy efficiency on a dark-mode billboard. The format is the message, and it reinforces itself thousands of times a day across screens that would otherwise be making the opposite argument by sheer brightness. That kind of ambient signaling lands differently with consumers than a campaign. It's also harder to dismiss as performative, because the savings accrue whether or not anyone notices the framing. Sustainability stops being something the brand says and becomes something the brand quietly does, in the background, at scale.