Last week my local Spar (Douglas St, Cork) were selling Phillips 11W (equivalent to a standard 60W, bayonet fitting) energy saver bulbs for €1. They were €3.99 in another supermarket this morning.
Will check if they still have them this evening. I presume other Spars have the same offer. Similar offers, and some even cheaper offers, are given in the thread below from a few weeks back. Still a good bargain from a Bricks & Mortar convenience store IMO.