The temporary aviation light on top of the Spire of Dublin was out of order last night, with high winds hampering workers trying to remedy the problem.
The Aviation Authority was informed of the problem and gave Dublin City Council a number of days to fix it.
This is not the first time the temporary light has given problems since the Spire was erected on O'Connell Street three weeks ago.
A Dublin City Council spokesman said the problem arose because the temporary light was located outside of the monument. The permanent lighting system for the monument would be contained within the structure, and would be protected from the vagaries of the weather, he said.
When the permanent lighting was in place, light would be diffused throughout the top 12 metres of the structure, through 11,884 tiny perforations, he said.
The Spire is 120 metres high, or seven times the height of the nearby GPO.
Meanwhile, the monument's official launch is not likely to take place until mid-March at the earliest.
The spokesman said the issue may be debated at the city council's March meeting.
Some council officials are considering alternative names to the Spire of Dublin, and these may be offered for discussion then.
Sinn Féin city councillor, Mr Christy Burke, has called for a public poll on the issue.
"I would love to see it called the 'Pádraig Pearse Spire'.
"But I feel the citizens of Dublin should be given a say in naming it," he said.
The council could set up a phone-in poll or get schools involved in suggesting names, he said.
The National Graves Association has suggested An Claidheamh Solais - The Sword of Light - to recognise both the Irish language and to honour Pádraig Pearse.
Dr Thomas McGrath, a historian at Trinity College, Dublin, has written to city councillors suggesting that the monument be called the "Brian Boru Spire".
Letter-writers to The Irish Times have offered less reverential suggestions.
These have included "The Why In the Sky", "The Eyeful Tower", "The Nail in the Pale" and "The Pointless Point".
