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I have a conference room that only has an on-off switch. Is this compliant with the credit requirements? If not, how can I improve lighting controllability in this space and also be compliant with LEED?

We have a lot of visitors in certain parts of our building, but we don’t necessarily want them to have controllability over lighting whenever they want. What do we do for these spaces? Can we still earn this credit?

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EBOM-2009 IEQc2.2:Controllability of Systems—Lighting

blinds for individual workstations

Profile picture for user Lyle Axelarris
Lyle Axelarris
Building Enclosure Consultant
BPL Enclosure
LEEDuser Basic Member
58 thumbs up

For multi-occupant spaces, a compliant option mentioned in the Bird's Eye View is to have an "on/off switch combined with blinds for a window." Is the same true for individual workspaces? If overall lighting levels are determined by overhead area-wide lighting, but the individual workstations each have a daylight window with blinds, can these workstations count toward achieving this credit? Thank you.

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Profile picture for user bstanley
Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Fri, 03/08/2013 - 17:37

I've never seen that approach attempted but I don't think that it would be accepted. The reference guide speaks to task lighting for individual workstations and so I think a reviewer would key in on that. Also, the blinds option for multi-occupant spaces requires control over an on/off switch too, which it sounds like the individual workstations in your case wouldn't have.
Profile picture for user Lyle Axelarris
Lyle Axelarris
Building Enclosure Consultant
BPL Enclosure
LEEDuser Basic Member
58 thumbs up

Fri, 03/08/2013 - 18:39

Thank you, Ben. I understand your point, but just to take the discussion further - we want daylighting to replace electrical lighting, so what is wrong with considering an individual daylighting device (i.e. window, Solatube, etc.) as a form of "task lighting"? If you agree with this, then wouldn't a control for this daylighting device (i.e. blinds, Solatube "daylight dimmer control", etc.) count towards this credit? My understanding is that only one individual lighting control for an individual workstation is required for a workspace to count toward achieving this credit (vs. the two lighting controls required for multi-occupant spaces). Is this correct? If all of the above statements are correct (indiv. daylight device = "task lighting"; indiv. daylight control = "indiv. lighting control"; only one indiv. lighting control is needed for compliance), then would a set of blinds for a window at each individual workstation count towards meeting the requirements of this credit? Thank you for insight.
Profile picture for user bstanley
Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Fri, 03/08/2013 - 21:21

It seems possible but my guess is that you would need to submit a project specific CIR to have a chance at earning the credit with that type of strategy. Another consideration for the strategy that you've lined out is what type/level of control do individuals have when there's insufficient daylight available for normal tasks (early morning, evening, seasonally short daylight days, overcast days, etc.)? That makes it seem like a challenging approach with respect to earning this credit as well.
Profile picture for user Lyle Axelarris
Lyle Axelarris
Building Enclosure Consultant
BPL Enclosure
LEEDuser Basic Member
58 thumbs up

Fri, 03/08/2013 - 22:08

Thanks for talking it through with me, Ben.

Wed, 11/20/2013 - 15:59

Quick clarification on this: Does a private office with an overhead light switch and adjustable blinds comply with the requirements? I could see why cubicle work spaces need task lighting, but for private offices, does the switch and blind offer enough control?
Profile picture for user danackerstein
Dan Ackerstein
Principal
Ackerstein Sustainability, LLC
LEEDuser Expert
545 thumbs up

Wed, 11/20/2013 - 21:10

The private office you've described does indeed comply Emily. I think you've got the logic down exactly. Hope that helps, Dan

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