I have a question about SSc6 and the BUG rating method. We would like to use the BUG rating method for LED strips/lines which are fixed on the facade of the project. The LED line will be placed in a C-shaped profile and oriented to the building. The building and the upper part and lower part of the profile shields the transmission of light partly.
My question is how to deal with the BUG rating method with LED strips? The U0, U1 etc. are based on a certain amount of lumens emitted per luminaire in a certain direction. However, what is seen as one luminaire when talking about a LED strip? The longer a LED strip, the higher the lumenoutput. Or do you have to look at the lumenoutput per/m and should this comply? It would be strange if 10 LED strips of each 1m comply with the BUG rating and one LED strip of 10m would not comply (assuming the same LED strip properties). Please help me with this!
Bill Swanson
Sr. Electrical EngineerIntegrated Design Solutions
LEEDuser Expert
731 thumbs up
April 3, 2018 - 1:51 pm
Yeah, this is one of the things I complained about with the BUG rating. Multiple, compliant fixtures can be mounted next to each other where the combined output would not comply. But that is how it is set up.
If the IES file or BUG rating is based on a 1m length of LED's then that is what I would base the BUG documentation on. If the light is mounted in different orientations then they will have different BUG ratings for each orientation.
Alex Chalenger
May 7, 2020 - 3:05 pm
I used the BUG rating method with LED strips last year, to garnish the exterior of my house. I had an 80 watt LED outdoor area light, equivalent to a traditional 250W metal halide fixture, with a Type IV forward throw distribution. I calculated the Backlight, Uplight, and Glare, and the combined BUG rating for this fixture was: B2 U0 G2. Knowing that I was able to choose the best equipment to accomplish this project, and I choose the https://www.ukled.co.uk/ . Everything is still there, still working, so I'm glad I did my job properly.