#illuminance — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #illuminance, aggregated by home.social.
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TIL that Zigbee illuminance sensors feeding into Home Assistant are a crapshoot. The balcony one toggles from 600lx at night (bit high) to a near-constant 3000lx from sunrise to sunset (clearly gibberish.) Bathroom door sensor is way too high - currently 2100lx where the handheld meter is showing 650lx.
Only the kitchen window sensors seem to be reporting reasonable values given the conditions (and they're close to the handheld readings but they are both the same exact model.)
#Zigbee #HomeAssistant #Lux #Illuminance #TIL -
Based on a part of our recent study #LPI at night moves pedestrians out of the dark curb zone and help pedestrians get peak semi-cylindrical #illuminance for incoming traffic occurs around 2–3 seconds into crossing. At a #walking speed of 1.4 m/s, our #SALUSLux simulation indicates an ideal LPI of 3–7 seconds. For pedestrians facing turning conflicts (and I personally experience this a lot even near #CMU campus -*-), peak visibility on the far side occurs around 7 sec
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More research suggesting a limit to street #lighting in terms of obstacle detection efficacy at high light levels: “Detection accuracy plateaued when maximum, average, and minimum #illuminance (Emax, Eave and Emin) reached 6.7 lx, 1.94 lx and 0.98 lx, respectively—indicating no additional benefit to obstacle detection beyond these thresholds.
“https://www.sciencedirect.com/science/article/pii/S2590123025036278