I have bought a new energy saving bayonet bulb to replace an older bayonet bulb that was already there, which blew yesterday. Although the bayonet part you insert looks to be the same size and pressed in well and turns on, I notice that it is slightly wobbly, not as firm inside the fitting like the other one was. Do you know if this is normal for the new different shaped energy saving bulbs? I am a bit worried about the safety aspect of using it without checking.