Greg Chappell expects wickets will fall regularly during the twilight period of the historic day/night Test in Adelaide.

Chappell said that despite all of the innovation and technological improvements in the game, one thing has never changed.

โ€œThe hardest part was the twilight,โ€ Chappell said.

โ€œUntil the lights took over, you were playing in bad light. That's what it was."

Chappell was part of the Australian side that played in the first ever day/night match during Kerry Packer's World Series Cricket revolution.

โ€œBecause the lights actually didn't have any impact in that twilight period,โ€ Chappell said.

โ€œThey were football lights so they weren't the quality of lights they have today.

โ€œAnd some of the grounds, you're dealing with sunset, so you have the sun streaming through gaps in the back of the stands and then there were other parts where there were shadows.

โ€œYou've also got the moisture coming up (through the wicket) or down (through the air).

โ€œFor the rest of my career, playing day-night cricket, that twilight period was the hardest. Once the lights took over, it was nowhere near as bad.โ€