@davidho LED street lamps have efficacy of 130-160 lm/W
Sodium street lamps have 200 lm/W
What do you mean by energy intensive lamps?
https://cdn1.npcdn.net/userfiles/19107/image/C432.JPG
https://www.assets.lighting.philips.com/is/content/PhilipsLighting/fp928145100008-pss-global