This page deals predominantly with improvements for the ubiquitous 12 volt halogen recessed downlights.
The home fitted with multitudes of recessed downlights is problematic because:
The flaws associated with downlights are as follows
Given the flaws described above, there is no single complete solution and finding the best solution depends on the situation and preferences! From an energy efficiency standpoint, the best solution of all is to remove all downlights, repair the holes and replace with well designed modern surface mounted or pendant light fittings. This solution resolves all problems once holes in the ceiling and insulation are restored.
The first step is to determine whether light fittings are 12 or 240 volt fittings. Some recessed fittings and track lights do not use a transformer, simply using 240 volts. This situation is more straight forward to deal with.