I have just bought some from Tesco. They are selling quality brand Ge Gu10 7w Energy Saving Lightbulb 6yrs warm white for £5. Also currently there is a deal Buy 1 Get 1 FREE Cheapest product free - valid from 10/11/2008 until 24/12/2008. Equivalent to 35W. See instore or online grocery site, just search for GU10. Lets hope they expand the range to include 9W & 11W! Also they produce full light quickly once switched on.