Hi people! I want to get quick consultation about the outdoor lighting. I will add a new barn for my commercial property. Now I have HPS lamps. What if to change all lamps to LED in new and already built structures. I know that the LED lamps will save money for the electricity bills. I counted, I need 30 LED lamps. What can you advice? How to choose reliable LED lamps? thanks

For the same amount of usable light (luminous efficiency), your power bill will almost certainly go up. But you might like the color better.

Posted By jonr on 11 Nov 2015 01:27 PM
For the same amount of usable light (luminous efficiency), your power bill will almost certainly go up. But you might like the color better.

Why would the bill go up? LED lamps use about 10% of the watts of an incandescent lamp.

But the OP doesn't have incandescent lamps.

High Pressure Sodium already has an efficiency comparable to LED.