Yes, you did read the title right!
Today our local Focus (Didcot) was offering the stick type of energy saving bulbs for 49p each - but the price was still 49p when we bought 5 - and that's not a till mistake, it was advertised as such!
They had both bayonet and screw types in the 20W, 15W and I think 12W sizes. (20W is equivalent to the brightness of 100W in the old style bulbs and 15W is the same as an old 75W bulb).
The brand name was "Ring" but there were also some Focus branded ones on the same deal.
No idea how long the deal is going on but hopefully long enough for a few people to pick up some bargain bulbs!