HPS luminaires (High Pressure Sodium) use

a single bulb

LED luminaires use an array of light emitters

1

Laboratory LED Prototypes Lumens / Watt

303 Lumens per Watt in 2014

Source data: March 26, 2014 CREE First to Break 300 Lumens-Per-Watt Barrier (CREE is a leading US based LED developer and manufacturer)

131 Lumens per Watt in 2006

2

Effi

cacy

(Lu

me

ns

pe

r w

att)

120

60

131

303

Emitters

Source data: LED luminaire data from Street Light Program archives

3

Effi

cacy

(Lu

me

ns

pe

r w

att)

4

Luminaires 200 Lumens / Watt

in 2020

Emitters Exceeded

200 Lumens / Watt in 2010

120

60

131

5

More Lumens per watt

Fewer emitters needed to generate

the same illumination

Lower manufacturing costs and less

energy consumption

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