Forum discussion
IF I have a lighting fixture with direct light, however, the fixture's glass is translucent / white glass. i.e. I can't see the light source through it but can only see a white lit surface,
Does this still count as direct-only fixture?
LEEDuser is supported by our premium members, not by advertisers.
Go premium forTo post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.
Where do I find the CRI of a lamp?
Do task lights need to meet all the lighting quality requirements?
How limiting are the reflectance values in the finish requirements?
Do operable shades count as lighting controls?
Does having multi-circuit lighting count as providing multiple lighting levels?
How do I calculate an illuminance ratio?
Is Option 1 achievable for open office spaces?
What lighting controls are required for a conference room with a presentation screen?
Kera Lagios
High Performance SpecialistEHDD
16 thumbs up
June 22, 2020 - 9:36 pm
Can you say more about the fixture? Is it decorative?
When speaking about "direct light", this includes things like linear fixtures that have an acrylic or polycarbonate lens, but where the light points down, as well as ceiling mounted fixtures with a diffuser around it. It doesn't mean that you have to be able to see the actual LEDs. It would be my thinking, without knowing more about the fixture, that your fixture would still be considered "direct light".
Kavita
O'Brien3601 thumbs up
July 9, 2020 - 4:50 pm
Hi ,
I have a similar question on Strategy D. Will the fixture with a direct component, can be exempted and need not be accounted under Strategy D, if it has an indirect component such as Pendant mounted Direct/Indirect linear downlight? Or we need to prorate the wattage based on the percentage of up/downlighting?
Karen Joslin
Sustainability LeadPAE Consulting Engineers
5 thumbs up
June 3, 2022 - 4:52 pm
Hi Omar - not sure if you ever received clear guidance on your question. In my experience any light energy that is leaving the fixture and coming directly down into a space is definitely considered direct. Even through lenses, etc. The intent is to reduce the "hotspot" appearances when vieing the light fixture to reduce glare and discomfort. Only light directed up and reflected off the ceiling or similar will count as indirect. Hope this helps even at this late date...
sophia123 janie
June 6, 2022 - 8:54 am
Thanks Karen, also helped me.
Joyce Kelly
Architect - Cx Provider - Building Performance SpecialistGLHN Architects & Engineers
27 thumbs up
October 27, 2022 - 1:03 pm
We need to provide commercial kitchen lighting for a Catering kitchen that is occasionally regularly occupied. (When they cater events, 6x a year, it's definitely regularly occupied.) Because the Kitchen represents more than 25% of regularly occupied space, does that mean we can't pursue option D for indirect lighting?
Karen Joslin
Sustainability LeadPAE Consulting Engineers
5 thumbs up
October 27, 2022 - 3:05 pm
HI Joyce - using the v4 metrics even a lensed light that shines other than upward is considered direct. The goal wa to use 75% reflected lighting for the spaces. However you should check out the v4.1 requirements instead - no more ABCDEF - and the glare control considerations have changed a lot. Always recommend switching this credit out.