Daylighting Analysis

Why is 300 Lumens important?

In an office space with LEED certification in mind, 300 lumens is significant because it is the minimum requirement for task lighting, ensuring that the lighting system is energy-efficient and provides adequate illumination for the occupants while also meeting sustainability goals.

sDA values

Daylight credits are assigned based on the sDA values. sDA values 75% and above recieve 3 credits, sDAs between 55 and 74% recieve 2, and values between 40 and 54% are awarded 1 credit.

ASE values

ASE values refer to the percentage of the floor that is being exposed to over 1,000 lux of direct sunlight for more than 250 hours anually. Further more any ASE value greater than 10% needs to provide a glare control strategy in order to receive the LEED Daylighting Credit.

Daylight Autonomy Sunlight Exposure

To read the key below one must know green represents the floor area that exceeds 300 lux for more than 50% of the year. The gray represents the floor area that recieve less than 50%.

To read the key below one must know orange represent the overlit areas that recieve 250 hours or more and gray represents the floor area that receieves less than 250 hours of daylight in a year.