As part of a New York State residential lighting program designed by Orange & Rockland Utilities, Inc.
and a New Jersey residential lighting program designed and implemented by the Free Lighting
Corporation, 7,700 homes have received comprehensive lighting retrofits. Equally important, a detailed
lighting census of each house and retrofit has been prepared, providing data on residential lighting not
previously published or available.
Considering the enormous size of the residential lighting marketplace, there is remarkably little field data
available on the actual end-use or on the potential for comprehensive retrofit. This paper will detail the
information learned to date from the comprehensive retrofit of 7,700 homes, with an average of 14.2
bulbs per house installed, several times that normally projected as being feasible.
The paper provides details on the number of incandescent bulbs in each house, the wattage distribution,
and the specific rooms which are most likely to have high lighting use. These will be analyzed by house
size and number of occupants. All of this data has extreme importance in analyzing cost-effectiveness of
lighting programs. Details are provided on the methods used to avoid the cream-skimming, lost
opportunities and savings "guesstimates" that have plagued earlier residential lighting efforts.
Equal attention will be paid to the actual installations. An analysis of the proportion of each lamp
replaced, the types and wattage of bulbs installed, average hours use by location, average wattage
reductions and energy savings, and cost-benefits will be explored. Finally, we will review market
penetrations and participant satisfaction as measured by post retrofit surveys.
This data is based upon a census of 7,700 treated homes containing 287,000 lamps, of which 109,000
were replaced at a total cost of about 4 cents per kilowatt hour saved.