Related by context. Frequent words. (Click for all words.) 61 halogen bulbs 60 fluorescent tubes 58 compact fluorescent lights 58 LED lights 58 incandescent lights 57 compact fluorescent bulbs 57 halogen lights 56 halogen lamps 56 incandescent lighting 56 bulbs 56 fluorescent bulbs 55 light bulbs 55 streetlights 55 fluorescent lamps 55 compact fluorescents 54 fluorescent lights 54 kerosene lamps 54 LED bulbs 54 incandescent bulbs 54 LED lamps 53 fluorescent lighting 53 wood stoves 53 fluorescents 53 fluorescent light 53 watt bulbs 52 incandescent lamps 52 compact fluorescent 52 CFLs 52 CFL bulbs 52 LED fixtures 52 woodstoves 51 halogens 51 furnaces 51 heaters 51 mercury vapor 51 lamps 50 CFL bulb 50 lightbulbs 50 lighting fixtures 50 bulb 50 boilers 50 lights 50 watt incandescent bulbs 49 compact fluorescent light bulb 49 incandescent bulb 49 streetlamps 49 watt bulb 48 compact fluorescent lamps 48 electric heaters 48 ballasts 48 efficient compact fluorescent 48 LEDs 48 water heaters 48 air conditioners 48 incandescents 47 light emitting diodes 47 pellet stoves 47 Streetlights 47 light emitting diodes LEDs 47 dehumidifier 47 photovoltaic solar panels 47 flush toilets 47 evergreen trees 47 incandescent light bulb 47 propane heaters 47 wood boilers 47 carports 47 poorly insulated 47 asphalt shingles 46 watt light bulb 46 Sprinklers 46 composting toilets 46 fluorescent 46 stoves 46 sprinkler systems 46 LED lamp 45 ENERGY STAR qualified 45 multicolored lights 45 retrofit 45 phosphors 45 automatic sprinkler 45 clothes dryers 45 light emitting diode 45 CO detectors 45 radiant heat 45 combustion turbines 45 radiant heating 45 HEPA filters 45 air conditioning 45 Air conditioners 45 microturbines 45 sprinklers 45 halogen 45 solar photovoltaic panels 45 space heaters 44 wood burning stoves 44 skylights 44 solar panels 44 internal combustion engines 44 kilowatts 44 buildings