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Royalty-Free Efficiency Photos, orientation: horizontal, dominant color: white
3190x2239
white CFL LED bulb
Public Domain
3600x2542
Analysis logo
Public Domain
5000x3000
gray, blue, and red dartboard with three arrows
Public Domain
5184x3267
Windmill Energy on Green Grass Field
Public Domain
3445x2297
person holding light bulb
Public Domain