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1 Introduction
Pages 4-10

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From page 4...
... Projections suggest that LED products will account for 48 percent of lighting sales in 2020 and 84 per- STUDY ORIGIN cent of sales in 2030 (based on the light output over product As required by EISA 2007, DOE engaged the National life) (Navigant, 2014)
From page 5...
... A discussion of being encountered with lighting quality (color shift, lumen lighting hardware, metrics for measuring light, color quality, depreciation, etc.) ; durability; power factor and generation and lighting technologies was provided in the earlier report of harmonics; and integration with controls (e.g., dimmer (NRC, 2013)
From page 6...
... and longer (red der) wavelengths.4 The actual luminous efficacy of a lighting There are two primary color properties of a light source: product is dependent on both the LER and the efficiency with chromaticity and color rendering.
From page 7...
... consisting of four wavelengths of spectral power at six different correlated color temperatures. For all SPDs, Duv = 0.000 and color rendering index (Ra)
From page 8...
... whereby increases in energy efficiency are offset by reduc tions in energy conserving behaviors of users, are accounted FIGURE 1.2  Maximum luminous efficacy of radiation as a for in this projection, but increases in the efficacy of lighting function of general color rendering index (Ra) for spectral power products used are expected to lead to a reduction of lighting distribution consisting of four wavelengths of spectral power, with energy consumption by an average of 3.1 percent per year correlated color temperature = 3,000 K and Duv = 0.000.
From page 9...
... parking garage lights, and 13.9 percent (4.0 million) for park- Although the purchase price of LED products remains ing lot lights, resulting in a total LED market penetration of more expensive than alternative technologies, the prices of 17.9 percent (32.7 million units)
From page 10...
... . A 2016 LED products are replacing incandescent lamps, presum- report found that only approximately 20 percent of LED ably, at least in part, because the Energy Independence and MR lamps had luminous flux values comparable their 50 Security Act of 2007 (P.L.110-14)


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