As lighting technologies evolve and adapt to federal standards, lighting in U.S. homes is in a state of transition. Data from the 2015 Residential Energy Consumption Survey (RECS) show that, as of 2015, most homes in the United States used more than one type of lightbulb, primarily a mix of incandescent and compact fluorescent (CFL). Adoption of light-emitting diode (LED) bulbs has been increasing, with 29% of U.S. households reporting at least one LED bulb installed.

Residential lighting generally shifted from less energy-efficient lighting, primarily incandescent bulbs, to more energy-efficient lighting, including CFLs and LEDs. In 2009, 58% of all households used at least one energy-efficient bulb indoors. In the 2015 RECS, which was administered from August 2015 to April 2016, 86% of households reported using at least one CFL or LED bulb. Nationwide, 18% of households reported that they had no incandescent bulbs in their homes.

Increasing the use of energy-efficient lighting has been a focus of many programs conducted by state and local governments and electric utilities. Between the two most recent iterations of the RECS (2009 and 2015) the lighting standards specified in the Energy Independence and Security Act (EISA) of 2007 began to influence residential lighting. EISA increased the minimum efficiency standards for general service bulbs (the type most commonly found in homes) starting in 2012, requiring that new bulbs be about 25% more efficient than traditional incandescent bulbs.

Efforts such as the federal ENERGY STAR program and the Lighting Facts labeling program were intended to help consumers make informed lighting choices. Energy efficiency programs administered by utilities and agencies in many states offered free or subsidized high-efficiency bulbs and provided education about energy efficiency.

Read more (U.S. Energy Information Administration)