Use a purpose-led review
DarkSky and IES identify five responsible-lighting principles: useful, targeted, low level, controlled and warm colored. They are a starting framework for asking where light is needed, how much is justified and when it should operate. They are not a substitute for application-specific design criteria. [1]
Understand BUG classification
TM-15 defines a luminaire classification system and BUG ratings for outdoor distribution. The ratings describe backlight, uplight and glare-related distribution. They do not by themselves certify the suitability of a whole installation; location, aiming and output still matter. [2]
Roads and parking require their own practice
RP-8 covers roadway and parking facilities, including different transportation settings. Use the applicable section and project conditions. A parking area, pedestrian route and road cannot be specified merely by copying a single illuminance number from another project. [3]
Review beyond the property line
Our site review marks windows, adjacent habitats, sightlines, neighboring uses and likely observer positions. Examine direct source visibility and where light is sent. Record the installed orientation rather than relying only on a catalog image.
Return after dark
Commission aiming and controls at the actual site. Observe transitions, occupied paths and unwanted spill under the operating settings. Retain a record of the accepted output and schedule so future replacement or reprogramming does not silently change the result.