What is the fine-grained topic of the following text: A-Type Incandescent Lamps will begin to be phased out due to federal minimum efficiency standards starting with 100W lamps in January 2012, continuing with 75W lamps the following year, and 60 & 40W lamps the year after. Only return the topic.
Phasing out of A-Type Incandescent Lamps due to federal minimum efficiency standards