Halopin lamps are small mains voltage bulbs that give the same bright sparkling light as the low voltage spotlights but the light spread is not controlled in any one direction, they can used to great effect in many situations.
They are mains voltage and do not need a transformer
They connect with two metal pins, the distance apart is 9mm apart
These have also been affected by the EU regulations so we will be unable to get hold of frosted bulbs in the future
These are the bulbs used in the G9 adapter lamps