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15 amperes 60-watt lamps absorb amber amount of light appear appliance branch circuits artificial lighting bathroom blue brightness candle ceiling fixtures ceiling outlet cent colored light comfort conductors convenience outlets dark daylight decorative devices Diffuse Reflection direct light efficiency electromotive force eyes factor feet filament foot-candle fuses garage glass gray green harsh illumination incandescent lamp inches indirect installed kilowatt kilowatt-hours kitchen lamp bulbs laundry light source light striking lighting effect lighting equipment lighting outlets living room lumen luminous luminous flux luminous intensity Medium Inside frosted ment meter National Electrical Code object obtained orange panel box placed pointer portable lamps produce rated reddish purple reflected screw base semi-indirect series circuit shade shadows sunlight surface systems of lighting table lamps temperature tion ultraviolet radiation unit unit expressing usually utilizing visible spectrum vision voltage volts wall brackets wattage watts wave lengths white light yellow