A tenant space includes an open office floor plan of 100 workstations and 10 enclosed...

For LEED Indoor Environmental Quality Credit concerning Interior Lighting, Option 1, the requirement is for 90% of building occupants to have individual lighting controls. Given that the tenant space includes 100 workstations and 10 enclosed offices intended for individual use, this means that a total of 110 workspaces require lighting control. To achieve one point, at least 90% of these occupants must have control over the lighting in their space. Therefore, the minimum number of occupants that would need individual lightingcontrols is 90% of 110, which calculates to 99 occupants (rounded down). However, as individual controls cannot be split between occupants, the actual minimum number would be 99 occupants. Option B is the closest answer to 99 without going under the required percentage.

References:Explanation of the requirements for individual lighting controls to meet the Interior Lighting Credit under Indoor Environmental Quality, indicating that 90% of building occupants must have task lighting .