Obtrusive light checker
Tingnan ang outdoor light sa boundary window ayon sa AS/NZS 4282.
Reads AS/NZS 4282:2023. Tables checked 1 Oct 2026.
Subukan ang isang job 7
Nilalagyan ng halimbawang value ang bawat job. Palitan ang mga ito ng sarili mong value.
- Check a car-park floodlight at a boundaryWhether a 20 000 lm floodlight 15 m from an upstairs window passes after the curfew.
- Check a bollard path at a boundaryWhether a 500 lm bollard 5 m from a neighbour’s window passes in zone A3.
- Check a tennis court floodlightWhether a 40 000 lm floodlight 20 m from a window passes.
- Check a security light on a houseWhether a 2000 lm wall light 8 m from a neighbour passes.
- Check a light in a rural zoneThe limits for a 5000 lm floodlight 30 m from the boundary in dark zone A1.
- Check a loading dock before the curfewA dock floodlight against the pre-curfew limit.
- Check the upward light of an uplightThe upward light ratio of a façade uplight.
Mga input
Worked example gamit ang mga default na input.
- Environmental zone
- A2, Low district brightness
- Sa panahon ng curfew
- Hindi
- Distansya sa boundary
- 10 m
- Taas ng gitna ng bintana
- 1.5 m
- Mga luminaire
- 1 row
Vertical illuminance sa bintana
47.67lx
- Limitasyon ng vertical illuminance
- 5lx
- Pinakamataas na intensity patungo sa bintana
- 3,143cd
- Limitasyon ng intensity kada luminaire
- 7,500cd
- Upward light ratio
- 0.020
- Limitasyon ng upward light ratio
- 0.01
Design aid lang ang resultang ito. I-verify ito laban sa kasalukuyang standard.
Mga hakbang ng kalkulasyon
- Environmental zoneA2, Low district brightness
AS/NZS 4282:2023 Table 3.1
- PanahonNasa labas ng curfew
AS/NZS 4282:2023 Cl 3.2.4
- Maintenance factor1
AS/NZS 4282:2023 Cl 3.2.2
- Gitna ng bintana10 m out, 1.5 m up
AS/NZS 4282:2023 Cl 3.3.1.3
- Peak intensity I04,775cd
- Anggulo mula sa axis ng beam35.8°
- Intensity patungo sa bintana3,143cd
AS/NZS 4282:2023 Cl 3.3.1.3
- Ev sa bintana, 2 × 23.836 lx47.67lx
AS/NZS 4282:2023 Cl 3.3.1.3
- Vertical illuminance sa bintanaResulta47.67lx
AS/NZS 4282:2023 Cl 3.3.1.3
- Limitasyon ng vertical illuminance5lx
AS/NZS 4282:2023 Table 3.2
- Pinakamataas na intensity patungo sa bintana3,143cd
AS/NZS 4282:2023 Cl 3.3.1.3
- Limitasyon ng intensity kada luminaire, Level 17,500cd
AS/NZS 4282:2023 Table 3.3
- Lumens sa itaas ng horizontal400lm
AS/NZS 4282:2023 Cl 3.3.1.8.2
- Kabuuang lumens20,000lm
AS/NZS 4282:2023 Cl 3.3.1.8.2
- Upward light ratio0.02
AS/NZS 4282:2023 Cl 3.3.1.8.2
- Limitasyon ng upward light ratio0.01
AS/NZS 4282:2023 Table 3.2
Tungkol sa calculator na ito
How this is calculated
The tool estimates the light a floodlight or bollard puts on a neighbour window. It checks the result against AS/NZS 4282:2023.
- Zone and period. You pick the environmental zone, A0 to A4, and whether the curfew applies. Table 3.1 defines the zones. Cl 3.2.4 sets the curfew period.
- Intensity toward the window. The tool takes the beam angle and the tilt of each luminaire. It finds the angle off the beam axis. It then reads the intensity at that angle from a simple lobe (Cl 3.3.1.3).
- Vertical illuminance. For each luminaire, it divides the intensity by the squared distance to the window. It applies the maintenance factor of Cl 3.2.2 and adds the luminaires.
- Illuminance limit. Table 3.2 gives the vertical illuminance limit for the zone and period.
- Intensity limit. Table 3.3 gives the intensity limit for one luminaire. The tool uses the Level 1 value.
- Upward light ratio. Cl 3.3.1.8.2 gives the share of lumens above the horizontal. Table 3.2 gives the limit.
| Step | Table or clause | What it decides |
|---|---|---|
| Zone | AS/NZS 4282:2023 Table 3.1 | The environment class of the site |
| Illuminance at the window | Cl 3.3.1.3 | The vertical light on the window |
| Illuminance limit | Table 3.2 | The most light allowed at the window |
| Intensity limit | Table 3.3 | The most intensity from one luminaire |
| Upward light ratio | Cl 3.3.1.8.2 | The share of light sent above the horizontal |
Worked example
- Two floodlights at a window 10 m away. Each unit gives 10,000 lm, mounted at 6 m and tilted 30°. Zone A2 applies outside the curfew. The tool gives 47.67 lx at the window against a limit of 5 lx, so it fails. The intensity of 3,143 cd is under the limit of 7,500 cd. The upward light ratio is 0.020 against 0.01, so that check also fails.
Limits
The result is a point-source estimate. A site measurement rules. The tool uses a lobe in place of the photometric file from the maker. Use the maker intensity table when you have it. Only direct light counts. Reflected light and obstructions are not modelled.
Level 1 intensity applies. Level 2 needs a precedent from existing lighting (Cl 3.2.5). Tilting a luminaire can raise the upward fraction, so type the value at the aiming angle.
See also: Obtrusive light and the 4282 zones, Car park floodlight obtrusive light at a boundary and the lighting lumen tool.
Mga tanong
Design aid ang resulta. I-verify ito laban sa kasalukuyang standard.
Aling environmental zone ang nalalapat sa site ko?
Sinusunod ng zone ang planning zoning ng lugar, kasama ang future zoning. Karamihan sa mga suburb ay A3, ang mga sparse rural at semi-rural na lugar ay A2, at ang mga town centre at industrial area ay A4. Magtanong sa council kung malabo ito.
Ano ang curfew?
Ang curfew ay ang late-night na panahon kung kailan nalalapat ang mas mababang limit. Maliban kung may ibang oras na itinakda ang council o ang consent, ituring ito bilang 11 p.m. hanggang 6 a.m. I-on ang curfew para suriin ang mga ilaw na nananatiling bukas sa loob nito.
Bakit tinatawag ng tool na estimate ang sagot nito?
Itinuturing nito ang bawat row ng luminaire bilang isang point na may makinis na beam. Ang totoong floodlight ay may sariling intensity table, at ang site ay may pader, puno at reflections. Gumamit ng photometric kalkulasyon o site measurement para sa panghuling sagot.
Ano ang upward fraction ng luminaire?
Ang bahagi ng lumens nito na lumalabas sa itaas ng horizontal sa aiming angle. Ang full cut-off luminaire na nakalagay nang patag ay may 0. Ang pagtagilid ng floodlight pataas ay maaaring magpataas nito, kaya kunin ang figure mula sa datos ng maker sa naka-install na tilt.
Ano ang Level 1 at Level 2 na intensity limit?
Sa labas ng curfew, nagbibigay ang Table 3.3 ng dalawang intensity limit. Ang Level 1 ay nalalapat sa bagong lighting. Ang Level 2 ay mas mataas, at nangangailangan ng precedent mula sa umiiral na lighting sa malapit. Level 1 ang sinusuri ng tool.
Mga worked example
Background
Mga clause at table na binabasa ng tool na ito
- AS/NZS 4282:2023 Cl 3.2.2Maintenance factor for obtrusive light
- AS/NZS 4282:2023 Cl 3.2.4Curfew and non‑curfew limits
- AS/NZS 4282:2023 Cl 3.2.5Level 1 and Level 2 intensity
- AS/NZS 4282:2023 Cl 3.3.1.3Illuminance and intensity at a window
- AS/NZS 4282:2023 Cl 3.3.1.8.2Upward light ratio of the system
- AS/NZS 4282:2023 Table 3.1Environmental zones
- AS/NZS 4282:2023 Table 3.2Light technical parameter limits
- AS/NZS 4282:2023 Table 3.3Maximum luminous intensities per luminaire
Bawat clause at table, kasama kung paano ito na-verify
Huling na-check ang mga table noong 1 Oct 2026.
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