Dear all, I am going to replace the HPS with the LED in the backyard.

May I ask that are core, universe LED flood lights suitable? Thanks a lot.

Actually how to properly illuminate the backyard? Thanks a lot :)))

Views: 149

Reply to This

Replies to This Discussion

You have to see the specks on the LED light. All tested bulbs have a graph with spread on height. Lets say your light replacement is 14 feet tall you cross the 14 feet to spread. I hope this helps but I do it all the time. Some High Presser Sodium will have a spread of 20 feet wide at 14 feet up.

Have you looked how much light you need in the backyard and where you need the light?  Often a one for one replacement is a gross overkill.  You may be able to significantly reduce the size (lumen equivalent) of the light.  Also are you in rural or urban area... if an urban area with neighbors close by you may want to choose a light that keeps more of the light on your back yard....

Well said Dennis, try a lighting calculation for the space you need.

Hi Mary,

What is the purpose of lighting the backyard ?  Sense of safety, night time enjoyment of the garden, some help seeing the path, to  walk from garage to home ?  Each of these purposes will lead to a different design. of fixtures, fixture placement and light source quality and output. Are you installing a 300 watt LED flood with the present efficacy of LED bulbs of close to 100 lumens per watt, that is a 30,000 lumens point source, that is a very bright light concentrated from a very small (surface area) source. Tell us more about what you want to accomplish, then the different solutions can be developed .

Greetings Jan Gravemaker.

RSS

Forum Discussions

Origin of guarded blower door testing

Started by Kim Tanner in General Forum. Last reply by Eric Kjelshus 8 hours ago. 9 Replies

Electro Magnetic Fields (EMF)

Started by Barry L NewDelman in General Forum. Last reply by Daniel Cullen Aug 10. 5 Replies

When is it too windy to use blower door?

Started by Brandon Walton in General Forum. Last reply by Iain Walker Aug 10. 17 Replies

Latest Activity

Eric Kjelshus replied to Kim Tanner's discussion Origin of guarded blower door testing
"That same house that meet highest sealing rate in early 1980 we went back and super sealed it and…"
8 hours ago
Jill Cliburn posted an event
Thumbnail

National Solar Conference and NZE Decathlon at University of Colorado

October 9, 2017 at 6pm to October 12, 2017 at 7pm
8 hours ago
tedkidd replied to Kim Tanner's discussion Origin of guarded blower door testing
"Brendan, Eric, great stuff!"
9 hours ago
tedkidd liked Kim Tanner's discussion Origin of guarded blower door testing
9 hours ago

Photos

Loading…
  • Add Photos
  • View All

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service