Found this in my local B & Q store on the deals section. 5 Philips Genie energy saving light bulbs, 11 Watt with 10 years lifetime for only £0.39p [before VAT reduction]. This makes it less than 8p for each bulb. A bargain in my opinion, in addition to being green.
For those who would like to vote this deal as 'cold', a comment for their reason would be highly appreciated.
Merry X-mas & A Happy New Year to all.