IIRC, they start at €500 and get doubled for repeat offences.
Personally, whilst I do think flares and smoke bombs can add to the atmosphere, if used correctly, they get the club fined, so leave them.
They've reared their heads in the Brandywell in recent years and they've universally been awful displays. A couple of morons on ego trips will light the flare, hold it for a few seconds, then throw them away when a steward moves near. Rather than help the atmosphere, it kind of kills it.
For comparison, in the IL you get arrested for using them.
http://www.irishnews.com/news/northe...r-park-472802/
Following conviction, could the club then sue the person responsible for the loss suffered from the fine?