FREE light bulbs

Received a letter this day from a partneship of two of the most respected companies
(they say), in the UK. This missive was addressed to "Dear Householder" not
"Dear Homeowner",so I presume they must think I'm a nonentity. (Quite right, too).
Anyway, they say that they wrote to me a few weeks ago with news of a fantastic
offer of some FREE (their capitals) light bulbs worth about £20. Now I don't
remember when I last had to change a light bulb - it must have been years ago, so
I don't think I'll be needing any replacements other than those stored away in the
back of my sideboard drawer.
This generous offer, I read, is only open to people on certain benefits. So why
write to me or to many other "Dear Householders" who, like me, must be wondering
how many thousands of FREE light bulbs these companies have stored away,
and are so anxious to get rid of.
Has anybody out there any suggestions as to what they should do with their
wretched bulbs?