England are preparing for the first day-night Test to be held in England, which begins on Thursday.
The challenges range from the question of "how the pink Dukes balls will perform, to the difficulties of batting as darkness falls, to the issue of whether starting later and the use of floodlights might require different tactics," says Cricinfo.
Here's what England are up against:
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The Dukes ball
The Test match is not the first to be held under lights nor is it the first to use a pink ball, but it will be the first to be played with a ball manufactured by Dukes.
The ball was used in a round of county games earlier in the season but not all England's players took part and some were rain-affected. Stuart Broad was one of those who missed out, but he's been brushing up on the ball.
"The Australian guys I know say that in the twilight period, the pink Kookaburra nips around. But in the county round, the guys said the [Dukes] ball went quite soft, quite quickly. It didn't shine up very well at all. It's given bounce for the spinners, but not really turned."
Wicketkeeper Jonny Bairstow was just as curious. "It's going to be fascinating to see how it will react after 60, 70, 80 overs – whether it's going to reverse or swing conventionally. It's going to be a learning curve," he said.
Experience
"England held their first ever pink-ball practice session under the Edgbaston floodlights on Monday night. It will also be their last," says Jonathan Liew of the Daily Telegraph. "It is hard to recall a modern-day England side going into battle with so little preparation, so little idea of what to expect, taking such a leap of faith."
They will be favourites against a West Indian side ranked eighth in the world. But they might prove to be a tough nut to crack. The tourists "have not only played a pink-ball Test before, against Pakistan in Dubai last year, they have also enjoyed an encouraging workout under floodlights, with four individual centuries either side of bowling out Derbyshire for 181 in their latest tour match", says Cricinfo.
"By contrast, the pink-ball matches in the Championship were six weeks ago and, in several cases, rain affected – in Yorkshire's match against Surrey, Joe Root faced 13 balls and Jonny Bairstow did not bat."
How they fare when batting at twilight and under lights remains to be seen.
Weather
Play can continue until 10pm at Edgbaston when there will be dew on the ground and temperatures will be down to around 14C, says The Times.
Stuart Broad says he will be wearing leggings under his trousers in the evening session.
"The colder evening weather offers a greater risk of muscle strains and twanged hamstrings, as Usain Bolt discovered to his cost on Saturday night," says Liew of the Telegraph.
Food
Another, apparently unimportant, issue that could affect the game revolves around the breaks.
"Standard, daytime Tests have their lunch break at, well, lunchtime, and their tea break at, give or take, tea time. A 2pm start distorts the timetable and, while 4pm can be referred to in many ways, if you are calling it lunchtime something has gone badly wrong with your day," says Simon Burnton of The Guardian.
But the first break at Edgbaston will still be called lunch and the second, at 6.40pm, will be tea. Previous day-night Tests have flipped the length of the breaks, but that won't happen at Edgbaston.
"Unlike in other parts of the world, the 40-minute 'lunch' break will be taken after the first session, rather than the second, potentially playing havoc with players' energy requirements," says Liew of the Telegraph. "Bowlers may be required to bowl well into the night having not eaten properly since late afternoon."
Why is it happening?
Despite all the confusion most people welcome the experiment.
"While Test match attendances remain rock solid in England and Wales, the popularity of five-day cricket is in decline in certain parts of the world," explains Sky Sports.
"By shifting the match timings, the hope is that more people will choose to watch Test cricket after work – indeed, you need only take a half-day's holiday to attend a game – and that more children can get a taste for it after school.
"Some 123,000 fans turned up across three days of Australia's clash with New Zealand in November 2015 – a record for a non-Ashes Test – so the early signs are promising."
