i have 8 halogen lights fitted into a false ceiling 2 are dead, one went about 6-8 months ago and one yesterday, i have tried new bulbs in both lights but none work. the lights have 1 cable comeing out of the real ceiling through the hole from the origional light, that cable enters a junction box from which 8 cables go to each individual light. The underside of the light fitting (bit attached to ceiling tile) say 12v but the top of the fitting says 240v. the bulbs are 12v 50w. Please help as i had an electrician look at it just after the first one broke and he said i need all new lights. thanks