The 2026 regulations do more than reshape car architecture: they change how drivers read each other in real time. The new rear and lateral light systems are not cosmetic tweaks, but a strategic and safety-driven upgrade that delivers direct information about energy deployment, mechanical status and on-track risk.

At the center of the concept sits the Rear Impact Structure (RIS), an oval-shaped light positioned in the middle of the car’s rear. Most of the time it appears red, but its function now goes far beyond visibility in wet conditions. It communicates hybrid energy levels. If a team reduces maximum output to preserve battery, the flashing sequence immediately reflects that decision.

A single flash means the MGU-K (Motor Generator Unit – Kinetic, the electric motor that harvests and deploys kinetic energy) is delivering less than the regulatory maximum of 350kW. Two flashes indicate it has stopped deploying electric power altogether. Multiple rapid flashes show that the MGU-K is harvesting while the ICE (Internal Combustion Engine) continues running normally. In practical terms, the chasing driver can instantly gauge a rival’s energy state.

The RIS also plays a broader safety role. It can signal a Safety Car period, a double yellow sector, an engine stoppage on track, or the use of intermediate or wet tyres, reinforcing its function as an active communication device.

The redesigned unit saves approximately 180 grams in weight and now integrates a rear-facing onboard camera. Crucially, it can change color. At present, it turns blue when a driver does not hold a full super licence, a particularly relevant feature as each team must field a rookie in four FP1 sessions per season.

“First of all we’ve got a new specification, which means we can change the colour. That way we can give different messages to who’s following. That will evolve and improve over time – it’s in order to not just have a single red one,” said FIA Single Seater Director Nikolas Tombazis.

“[At the moment] they are intended to give warnings to drivers behind if there’s a recharge going on, whether there’s a sudden deceleration, and clearly there’s also the main function, the original function, which is in the rain. We feel that with the new specification, which can do different colours, we can provide more information to who’s behind,” he added.

To enhance clarity, the rear wing endplate lights mirror the exact flashing pattern of the RIS, although they always remain red.

The second major addition is the lateral safety lights, integrated into the mirrors. They activate only in the event of a spin or accident and are visible from both the side and the front. Amber in color, they illuminate when the car has stopped completely or when its speed drops below 20kph. They may also appear if a car is stuck in neutral at the start, switching off as soon as a gear is engaged.

“They were an idea by the drivers in one of the driver meetings. Basically, they were saying that if a car has spun around in the wet conditions and is sat laterally, you cannot see the rear light, because you’re on the side. You may be an approaching car, and because it’s a bit misty, you may not see it. Therefore, it was proposed that there would be some lateral lights, so this is why we added those lights,” Tombazis explained.

Beyond aesthetics, the message is clear: the 2026 cars will not only differ in power and aerodynamics, but in how they communicate critical information on track. Energy visibility and multi-angle signaling become part of Formula 1’s evolving competitive language.

Thumbnail credits: © Filedimage | Dreamstime.com