Assuming that you are entitled to Personal and PAYE tax credits of 3750 euro.
You can earn 18750 euro per year before you enter the income tax net.
This means that you will have some capacity for extra tax free income after taking your widows pension.
If you are liable for any income tax by taking all your taxable pension income in one year, you could instead buy an ARF and take your pension money over several separate years, to take your total yearly income up to the 18750 euro level.
There is total flexibility in the amount of ARF drawdowns per year.
By doing this you could avoid paying any income tax on your private pensions.
If you want to minimise the ARF fees you could take out an execution only ARF.
The previous poster Gerard Sheehy provides this service at. prsa.ie