White was the son of Irish bookseller, lottery operator and Member of Parliament for County Leitrim Luke White (sr.).
Born before 1789, Luke White junior stood for election as MP for County Longford on a number of occasions, initially as a Whig and later as a supporter of Daniel O'Connell's Irish nationalist Repeal Association.
After winning election in 1832, 1835 and 1841 his victories were overturned within months by committees of inquiry by the House of Commons and the seat handed over to his political opponents.
Luke's brothers Samuel and Henry were also elected MPs, and Henry was ennobled as 'Baron Annaly of Annaly and Rathcline' in 1863.
This article about a Member of the Parliament of the United Kingdom, for a constituency in Ireland between 1801 and 1922 is a stub.