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1. Considering the following data for fluorescent and incandescentbulbs to answer the following questions:

	Fluorescent bulb	Incandescent bulb
Light output (lumens)	985	1000
Life (hours)	10,000	3,000
Energy Use Rate (watt)	13	100
Purchase cost ($/bulb)	3.75	1.55
Energy costs ($/kW-h)	0.12	0.12
Disposal/Recycle cost ($/bulb)	0.98	0.05

Data from several source: Amazon.

1. Estimate the 2018 energy savings potential on a national scaleof replacing all incandescent bulbs in home (residential) with thenew energy efficient fluorescent bulbs. Consider that in 2018,total US energy consumption was 101.3 quadrillion British thermalunits (Btu). Electricity consumption for all applications amountsfor 13 quads, and residential is 11.9% of all electricityconsumption in US. Assume that all energy consumption forresidential lightning is due to incandescent bulbs and that allthose are replaced by fluorescent bulbs. How large are energysavings compared to annual US energy and electricity consumption?State your answer on a percentage basis.

(8 points)

1. From a LCA perspective, define a functional unit andequivalence for this comparison of fluorescent and incandescentbulbs. How many incandescent bulbs are needed to equal onefluorescent bulb? Comment your results. (4points)
2. Develop an inventory of costs over the life cycle for each bulbtype. Compare cost over the life cycle for fluorescent bulbs vs.incandescent bulbs. Which stage of the life cycle accounts for thegreatest cost to the consumer? (8 points)

(Total: 20points)

1. NOTE: be careful with unit conversion, purposely theinformation comes in a mix of units.