I have two lights on the ceiling of my bathroom and I have been using GE 60 watt ES bulbs that Screwfix used to sell at 10 bulbs for peanuts but they no longer sell them .
I added two bulbs to a Tesco order today and two of them were GE Energy Saving 11watt /60 watt equivalent at £1.68 each . Looking at the box it says " not to be used in enclosed fittings" so I just stuck in two 60 watt candle bulbs that I got as well.