As PaulKirby suggests Halgen can cause noise issues.

Mains Halogens which run at 230v are unlikely to unless on a dimmer, however the 12v ones will have a voltage converter - either a transformer, SMPS or a cheap and nasty lash up. A transformer will only cause noise issues up to hundreds of hertz so will not affect DSL, An SMPS when properly designed and shield can be fine but leave shielding off or a bad design and depending on operating frequency could cause noise into the hundreds of kilohertz or even the low Megahertz range. The cheap and nasty methods - who knows where the roblems could be.

you misunderstood my post.

the rearranging will happen in a few areas where its decided its viable even without the rearranging, but then the rearranging will improve sales due to increased coverage, this will definitely not happen on every g.fast enabled cabinet but it will happen on some. The cost of rearranging is quite low sometimes, its only never been done for policy reasons.