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Description	Commonly used residential lighting, functions through the heating of coil or filament of tungsten wire by electrical current.
Advantages	Cheap purchasing cost No 'warm up' period Excellent color rendition No toxic materials
Disadvantages	Least energy efficient Relatively short lifespan
Application barriers	Lights burn extremely hot Government regulated in certain locals
Information sources	[[Information sources::Source Source Source Source Source Source Source]]
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Trade:

Type	Standard Incandescent Bulbs, Tungsten Halogen Bulbs, Reflector Lamps
Lamp Voltage	120 V
Lumen Output	520-800 lm
Voltage	220-250 Vac
Lamp Current	100 W
Luminous Efficiency	8-24 lm/W
Annual Degradation Rate in Luminous Efficiency	5% / year
Color Temperature	2500-5000 K
Color	Warm white light
Color Rendering Index	100 on the CRI scale
Beam Angle	15-90°
Average Lamp Life	750-1000 hours
Type of Protection	Air tight glass enclosure
Investment Cost	Minimal
Operational Cost	$0.10 / kWh
Replacement Cost	Minimal
Life Expectancy	750-1000 hours

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The Design4Energy project aims to address evolutionary life-cycle evolutionary design methodology able to create energy-efficient buildings flexibly connected with the neighbourhood energy system.

BL(Ti)=0.788

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Lighting 4