We've been away for a week, and it appears that another few bulbs took this as their opportunity to say "goodbye, cruel world" and "hasta la vista, baby" and furiously incandesce themselves into oblivion. Actually, one couldn't wait and gave up the ghost before we'd even left, but we found two more had committed filamentary seppuku on our return. You'll be wanting to tick these off on your Bulb Bingo card, so here they are:
Firstly, bulb number 10, which went on May 9th - this was an incandescent 25W job, which at 99p for 10 days works out at, let's say, 10p per day.
Then on our return today, two more. Firstly bulb number 4, one of the new batch of incandescent 40W ones, which at £1.49 for 18 days works out at a smidgen under 8.3p per day.
Then, later, bulb number 5, another incandescent 25W one, which at 99p for 18 days works out at 5.5p per day.
So by the rule I've just invented (but which seems reasonable enough) that says the expensive bulbs need to perform at least as well as the longest-lasting incandescent bulb, the required minimum expiry dates for the 4 quid LED bulbs and the £7.98 energy-saver are now 73 days and 145 days from their respective installation dates, or, to put it another way, July 19th and September 21st. Watch this space.