Last time this was posted was over a year ago, so reposting. Wattages have also increased to 5W. Various sizes available:
Bayonet Candle BC22
Bayonet Golfball BC22
Edison Screw E14
Edison Golf Bulb E14
Despite being only 5W I found these much better & brighter than the ones I bought on Amazon for 1p plus £2.25 postage.