After the success of the Singapore Grand Prix, floodlit night races have become popular in Formula One. But rally drivers have been competing in the dark for years - and the only lighting they get are the spotlights affixed to the front of their machines.
The opening stages of Wales Rally GB took place in the dark on Thursday night, taking in three challenging Welsh forest stages. Night stages are loved by some drivers and hated by others - they heighten the senses, increase the sensation of speed, and reward confidence and commitment. It's the same story for fans: it's hard work to get into a forest at night, but absolutely worth it to see and hear cars at speed in the dark.
Rising Welsh star Elfyn Evans, who is tackling the second-tier WRC2 championship in a Ford Fiesta R5 run by the top M-Sport team, says: "Night stages feel quite different to rallying in the daytime. It's a strange feeling when you're getting ready to start: it's dark outside and you can't see what's around you, and yet you're getting ready to strap yourself into a rally car.
"When you get into the stage it's like tunnel vision - the only light is in front of you. You can't see very far ahead, and you've got absolutely no peripheral vision. You have to trust your pacenotes 100 per cent to commit to the stage and set a fast time. It's an exciting feeling."
In the last few years, the traditional rally car spotlights are undergoing a transformation: the big bulbs of old are fast being replaced by thin strips of LEDs. They offer a good weight saving, but the drivers have had to make adjustments.
"There are advantages and disadvantages to them," says Evans. "They produce a very white artificial light, which is nice and bright. But when you hit a fog patch it reflects back really badly. They give more of a spread directly in front of you, which is good."
Evans used his spotlights to great effect, and leads the WRC2 division in ninth overall at the end of day two. His local knowledge helped, although not as much as you'd think: he reckoned he hadn't driven through part of one of the stages since 2006 - and that was in a 1.0-litre Nissan Micra. His current four-wheel-drive turbocharged Fiesta is a slightly different beast...
Up at the front, world champion Sebastien Ogier holds the advantage at the end of day one in his Volkswagen Polo R WRC, having set two fastest stage times. But with not much mileage done, the gaps are small: the Frenchman is just 3.2s ahead of M-Sport Ford Fiesta driver Thierry Neuville, with the second Polo of Jari-Matti Latvala close behind. Neuville could have been even closer too: he had a small problem with the gear lever after cutting a corner too much and bumping the underside of the car on stage two. He recovered to set the fastest time on the night's final stage.
Robert Kubica's first night in a World Rally Car went well, and the Citroen DS3 WRC driver is a solid seventh overall, mixing it with drivers with far more experience of rallying and WRC machines than he has.
While Thursday's stages were new to most of the drivers, Friday's should be more familiar, taking place in Hafren, Sweet Lamb and Myherin in mid-Wales. They're classic stages that have been used recently - and tomorrow, all the action should take place in the light - Welsh weather depending, of course. While spectating on the shakedown test this morning, I was caught in a brief hailstorm. Proper Rally GB weather, as they say...