. . . you could get light bulbs with timers on them . . . !
Personally, I use a low energy 20w bulb in a 365/24 location down the drive.
It's housed in an all in one unit from B&Q with a photosensitive switch which brings it on at dusk and switches it off in the morning. (Mine's a bayonet fitting, but screw fittings are less popular so sell slower therefore there should be more available.)
As for where to get the bulbs - well Morrisons and Tesco have both had promotions on where you can buy a single one for about £1 or buy five for (something stupid like) 50p. I've stocked up and Morrisons sell Philips and I think Tesco are on General Electrics.
Dont forget that low enery bulbs do not like being switched on and off in short time periods, I would have thought that it was the bulbs that are blowing the fuse rather than the timer, I have garden low enery bulbs operated by a timer, but they are on for several hours at night, and they have been fine for over a year