Hi,

I am working for a proposed LEED Factory in Bangladesh. As part of Mandatory requirements in ASHRAE 90.1 2010 Section 9.4.1.4, Automatic Daylighting Controls for Primary Sidelighted Areas, the project has an ample of primary side lighted factory area, although as per the factory norms of the country, a specific LUX level has to be maintained in the factory workspace area.

Now, do I still have to provide daylight sensors in factory area ?

Since the stated requirement is that the multilevel photocontrol shall reduce electric lighting in response to available daylight with at least one control step that is between 50% and 70% of design lighting power and another  control step that is no greater than 35% (including off) of design power.