Fuelled by a massive away following and of course hundreds of neutrals wanting to see a PL club, but take the point this was a record crowd, was it full capacity actually, close to I`d imagine.
Not sure if you mean full capacity for the night or in general, but Tallaght holds just over 10,500.
Although it wouldn't be possible to achieve that without giving away a full stand to away support due to seat kills etc.