Related by context. Frequent words. (Click for all words.) 80 incandescent bulbs 69 CFLs 67 LED bulbs 65 incandescent light 65 light bulbs 63 bulbs 63 LED lights 58 incandescent 58 lightbulbs 57 fluorescent lighting 55 LEDs 54 bulb 52 ENERGY STAR qualified 51 compact fluorescent light 50 light bulb 50 LED lighting 49 halogen 48 lamps 48 light emitting diodes 48 kilowatt hours 48 kWh 46 wood stoves 46 kilowatt hour 46 watt 46 lights 45 lightbulb 45 lighting fixtures 45 watts 45 LED 44 fluorescent lights 43 kilowatts 43 streetlights 42 fossil fuels 42 kwh 42 water heaters 41 BTUs 41 kilowatt 41 lighting 41 OLEDs 41 lumens 41 reduce carbon emissions 41 air conditioners 41 ENERGY STAR 41 solar panels 40 water heater 40 internal combustion engines 40 retrofitting 40 holiday decorations 40 photovoltaic panels 40 fossil fuel 40 ENERGY STAR ® 40 Earth Hour 40 space heaters 39 retrofit 39 Solar panels 39 reusable bags 39 LCDs 39 renewable 39 Lighting Science 39 lamp 39 electricity 39 fluorescent 39 environmentally friendly 38 air conditioner 38 wattage 38 rooftop solar 38 Christmas decorations 38 recyclable 38 Lighting 38 boilers 38 furnaces 38 globes 37 evergreens 37 daylight saving 37 streetlight 37 inverter 37 stoves 37 thermostat 37 appliances 37 Christmas Tree 37 acid batteries 37 smoke alarms 37 neon signs 37 extension cords 37 carbon dioxide emissions 37 diodes 37 renewable energy 37 cleaner burning 37 lighted 37 batteries 37 inverters 37 reflectivity 37 lithium batteries 37 neon lights 37 electrical appliances 37 Energy Efficiency 37 thermostats 36 internal combustion engine 36 lanterns 36 renewables 36 mW