I recall this buggered us up in the Premier League.Upwards of a million to install and needs to be on for about 2 days prior to game as well as day itself. Cost per day is £5000 for power apparently. Many clubs outside the Premier league have it installed but simply can't afford to switch it on
We had just 1 home game in 2 months from the beginning of November to the beginning of January. We ended up with fixture congestion later on, and among other things this cost us in the end.