A low energy bulb died, so I removed it and replaced it with another. However as the general belief is that they are 'long life' as well as low energy and this one had not such a long life- I thought I would check it in another location. Sure enough it did bot come on in the location either. But as I removed it clear of the fitting it came on fully and as I placed in the desk continued to flicker. Tried it once more and the same, as it came out of the fitting- it came on briefly and if flicked with finger it flickered. Just like one of those conjurer's trick bulbs
Perhaps this is the first of a new type of bulb Energy Free Master that one and the world energy problem would be resolved.
I've just replaced one that failed on the stairs. It's certainly not lasted anything like the claimed life. Funnily enough, it worked fine during daylight hours when the house was warmer, but failed to strike during the night when the house was colder.