Related by context. Frequent words. (Click for all words.) 77 incandescent bulbs 66 CFLs 64 incandescent light 57 bulbs 56 light bulbs 55 lightbulbs 54 incandescent 52 bulb 51 LED lights 50 LEDs 49 light bulb 45 wood stoves 45 LED lighting 44 fluorescent lights 44 lighting fixtures 43 coal fired 43 lightbulb 42 fossil fuels 42 OLEDs 41 halogen 41 furnaces 41 space heaters 40 stoves 40 kilowatt hours 40 watts 40 ENERGY STAR ® 40 lamps 40 fossil fuel 39 watt 39 kWh 39 kilowatt hour 39 light emitting diodes 39 ENERGY STAR 39 poinsettias 39 compact fluorescent light 38 incinerators 38 acid batteries 38 LED 38 lights 38 boilers 37 wood stove 37 water heater 37 candles 37 LCDs 37 lumens 37 reusable bags 36 renewables 36 holiday decorations 36 streetlights 36 vinyl siding 36 electricity 36 photovoltaics 36 kilowatts 36 Christmas decorations 36 lithium ion batteries 36 incineration 35 burners 35 heaters 35 lithium batteries 35 kwh 35 cleaner burning 35 blast furnaces 35 fireplaces 35 renewable energy 35 renewable 35 wattage 35 water heaters 35 biomass 34 brightness 34 smoke detectors 34 dimming 34 carbon dioxide emissions 34 standby mode 34 daylight saving 34 OLED 34 candle 34 lamp 34 thermostats 34 coal gasification 34 CFCs 34 landfills 34 coal 34 streetlight 34 air conditioners 33 gas guzzlers 33 emit 33 mercury emissions 33 switchgrass 33 diodes 33 NOx 33 analog signals 33 dishwashers 33 farmed salmon 33 lanterns 33 solar panels 33 energy 33 Daylight Saving Time 33 internal combustion engines 33 inverters 33 backlighting 33 dryers