Not sure where you are located, but if you have ceiling halogens to replace, there are two options - to use a low voltage bulb + separate PSU or the 'all in one' bulbs. Here in the UK they are designated GU10 for mains voltage and MR16 for 12v. If you go with 12v bulbs, you can invest in a decent power supply for them, and hence also avoid the poor quality bulb problem.
It's possible to get power supplies to support multiple bulbs daisy chained, so you can invest in one decent power supply.
For general bulbs (e.g. chandelier tulip bulbs) i've found it to be really hard to find stuff that works reliably. 'Normal' round bulbs seem to be more reliable for some reason.
It's possible to get power supplies to support multiple bulbs daisy chained, so you can invest in one decent power supply.
For general bulbs (e.g. chandelier tulip bulbs) i've found it to be really hard to find stuff that works reliably. 'Normal' round bulbs seem to be more reliable for some reason.