In the early days wasn't the waca used for footy purely due to having lights? Subi didn't get lights until late 90's?
In the early days of the Eagles, yes. There was concern at the time for the future of the WAFL as it was feared (rightly) that Eagles matches would steal crowds away. There was an agreement that the Eagles homes games wouldn't clash with WAFL fixtures. WAFL played saturday afternoon, so all Eagles home games were scheduled for Friday night or Sunday afternoon instead. The WACA was the only place that could host night games.