Why is the minimum efficiency requirement raised to class A only for frosted (non-transparent) lamps, not for all lamps?
The requirement on clear lamps is only raised to class C until 2016 (and to class B beyond 2016), so that other efficient technologies (such as improved halogen lamps) can remain on the market. This is necessary because current-day compact fluorescent lamps and light emitting diodes cannot provide the same type of light as the incandescent lamps that are being phased out. However halogen lamps do, and consumers who are keen on incandescent light quality for aesthetics or health reasons should have access to it.
