In January 2007 the 150 watt lamp, bulb to most people but lamp to us sparky's, was made obsolete and this year the 100 watt was also made obselete to make way for the low energy type to save energy and do the usual stuff to the environment.
If you really need a bright lamp in your light fitting then goto an electrical wholesaler, not B&Q as they don't keep them, to get a colour 840 or 860 which are natural daylight and sky white respectively as these lamps will give out a better light output from the normal colour 827, warm white, that you buy from the local shops....