Tātaitai lumen method mō te rama
Te tatau luminaire me te kōrero mō tētahi rūma mā te lumen method.
Reads AS/NZS 1680.1:2006 and AS/NZS 1158.1.2:2010. Tables checked 1 Oct 2026.
Whakamātau mahi 11
Ka whakakī ia mahi i ngā uara tauira. Whakakapia ērā ki ō uara.
- Light a kitchen by the lumen methodHow many downlights a kitchen needs for its target lux, in a grid.
- Light a garage with battensHow many LED battens a garage needs, laid out in rows.
- Light an office to 320 lxHow many panels an office needs to AS/NZS 1680.1 Table 3.1, with the spacing check.
- Light a warehouse with high baysHow many 20 000 lm high bays a 30 by 20 m bay needs.
- Light a corridorHow many downlights a 12 by 1.5 m corridor needs.
- Light a bathroomHow many downlights a 3 by 2.4 m bathroom needs.
- Light a living roomHow many downlights a 6 by 4.5 m living room needs.
- Light a bedroomHow many downlights a 3.6 by 3.2 m bedroom needs.
- Light a switchroomHow many battens a 5 by 3 m switchroom needs.
- Light a classroom to 320 lxHow many panels a 9 by 7 m classroom needs at a target you set.
- Light a dusty workshopThe count with a maintenance factor from Table 14.4.
Ngā whakauru
He tauira mahi me ngā whakauru taunoa.
- Whakamahinga rūma
- Rūma noho
- Roa o te rūma
- 4 m
- Whānui o te rūma
- 3.5 m
- Teitei tāpapa tuanui
- 2.4 m
- Teitei o te rama ki runga i te papa
- 0 m
- Rārangi mahi
- 0 m
- Rama whāinga
- 0 lx
- Lumens ia whakarāmaha
- 800 lm
- Wati ia whakarāmaha
- 9 W
- Koki rama
- 90 °
- Ngā whakaata, tuanui / pakitara / papa
- 70/50/20 %
- Tauwhiwhi tiaki rama mai i te Ripanga 14.4
- Tōna ake tauwhiwhi
- Maintenance factor
- 0.8
Ngā whakarāmaha
6
- Reti
- 3 ki te 2
- Wātea i te roa
- 1.33m
- Wātea whakawhiti
- 1.75m
- Te rama e hoatu ana e te whakatakotoranga
- 156lx
- Kiato hiko rama
- 3.86W/m²
He āwhina hoahoa tēnei hua. Manatokohia ki te paerewa o nāianei.
Ngā hīkoi tātaitanga
- Wāhi papa14m²
- Tauāhua mārama whāinga150lx
Typical design value. Not a standard’s value.
- Rārangi mahi0.7m
AS/NZS 1680.1:2006 Table 3.2
- Teitei rama2.4m
The ceiling
- Teitei i runga i te rārangi mahi1.7m
- Tohu rūma
K = L × W / (Hm × (L + W))
1.1 - Tauwhāinga whakamahi0.57
Typical value for a direct luminaire. Use the maker’s table when you have it. Reflectances 70/50/20 %.
- Tauwhiwhi tiaki0.8
- N = E × A / (Φ × UF × MF)5.76
- Te grid3 by 2
- E' = N' × Φ × UF × MF / A156lx
- Wātea ki te teitei, te nui rawa1.03
Spacing to height ratio for even light. Typical.
- Te kaha hiko ia rohe mō te rama3.86W/m²
Mō tēnei tātaitai
How this is calculated
The tool finds how many luminaires a room needs. It uses the lumen method. The target lux comes from AS/NZS 1680.1:2006 where that Standard lists the room use.
- Room and plane. The tool finds the floor area. It reads the target illuminance and the working plane height for the room use (Tables 3.1 and 3.2).
- Room index. It works out K = L × W / (Hm × (L + W)). Hm is the luminaire height above the working plane.
- Utilisation factor. It reads a typical factor for the room index and the reflectances you pick. You can type your own factor from the maker's table.
- Maintenance factor. It uses the value you give. The helper reads the luminaire factor from Table 14.4 of AS/NZS 1158.1.2:2010. You type the lamp lumen factor.
- Number of luminaires. N = E × A / (Φ × UF × MF). The tool rounds up to a grid that fits the room shape.
- Check. It works the lux the grid gives, the spacing to height ratio and the lighting power density.
| Step | Table or clause | What it decides |
|---|---|---|
| Target illuminance | AS/NZS 1680.1 Table 3.1 | The lux for the room use |
| Working plane | AS/NZS 1680.1 Table 3.2 | The height of the task plane |
| Maintenance factor | AS/NZS 1158.1.2 Table 14.4 | The luminaire factor for dirt |
Worked example
- Office, 6 m by 5 m, 3000 lm luminaires. The ceiling is 2.7 m. The target is 320 lx. The tool gives 9 luminaires in a 3 by 3 grid. That layout gives 449 lx.
Limits
- For a living room and some other uses, the target is a typical design value. It is not a Standard value. Check it against your brief.
- The utilisation factor is typical for a direct luminaire. Use the maker's table when you have it.
- The tool does not model glare, uniformity or a photometric file. It does not replace a lighting design programme.
- The grid is an even layout. A room with obstructions or a feature may need a different layout.
- The tool does not read AS/NZS 3008 and has no edition select.
See also: Worked examples by tool and trade, Obtrusive light and the 4282 zones and Obtrusive light.
Pātai
He āwhina hoahoa te hua. Manatokohia ki te paerewa o nāianei.
He aha te mahi a te taputapu Lumen Method mō te Rama?
Ka kimi i te maha o ngā luminaire e hiahiatia ana e tētahi rūma mō tētahi illuminance whāinga. Ko te tatau ko te whāinga whakareatia ki te horahanga papa. Ka wehea taua mea ki ngā lumens o tētahi luminaire, ki ngā tauwehe e rua. Ka whakatakoto te taputapu i te tatau hei grid, ā, ka arotake i te mokowā ki te teitei whakapūmau.
Nō hea mai te lux whāinga?
Ko te rūma mahi, pēnei i te tari, i te whare rongoā rānei, ka pānui i AS/NZS 1680.1:2006 Table 3.1, ā, ka whakaingoa e te kōwae. Ko ngā rūma o te whare, tae atu ki te kīchina me te karāti, kei te raupapa AS/NZS 1680.2, kāore e pupuri ana a AmpSize. Ka whakamahi rātou me ngā wāhi o waho i ngā uara arorau, ā, ka kī te taputapu pēnei. Ko te 240 lx a Table 3.1 mō te whakarite kai mahi anake.
He aha te utilisation factor?
Ko te wāhanga o te rama o te lamp e tae ana ki te working plane. Ka pānui te taputapu i tētahi uara tauira mō tētahi luminaire tōtika. Ka whakamahi i te room index me ngā reflectance o te tuanui, te pakitara, te papa. Whakamahia te ripanga a te kaihanga ina whai koe: kōwhiria te Own utilisation factor, ka tuhi i te uara.
Nō hea mai te maintenance factor?
Tuhia tōu ake, ā, tangohia rānei te maintenance factor o te luminaire i AS/NZS 1158.1.2:2010 Table 14.4. Kāore taua ripanga e uru ana te whakaiti lumen o te rama. Nā reira ka tono te taputapu i te lamp lumen maintenance factor mai i te pepa raraunga: he L80 ka pānui hei 0.8. Ko te maintenance factor te whakareatanga o ēnei e rua.
Ngā tauira mahi
Kōrero o muri
Ngā Clause me ngā Table e pānuitia ana e tēnei taputapu
- AS/NZS 1680.1:2006 Table 3.1Recommended maintained illuminances for various types of tasks, activities or interiors
- AS/NZS 1680.1:2006 Table 3.2Lighting parameters for general lighting: recommendations
- AS/NZS 1158.1.2:2010 Table 14.4Typical luminaire maintenance factors
Ia Clause me Table, me te pēhea i manatokotia ai ia tētahi
Ngā tūtohi i arotakehia whakamutunga i te 1 Oct 2026.
Ngā taputapu hononga
He whai hua tēnei?
He pātai, he uara rānei e kitea ana he hē? Whakapā mai.