Lighting lumen method calculator
Bilang at grid ng luminaire para sa room ayon sa lumen method.
Reads AS/NZS 1680.1:2006 and AS/NZS 1158.1.2:2010. Tables checked 1 Oct 2026.
Subukan ang isang job 11
Nilalagyan ng halimbawang value ang bawat job. Palitan ang mga ito ng sarili mong value.
- 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.
Mga input
Worked example gamit ang mga default na input.
- Gamit ng kuwarto
- Sala
- Haba ng kuwarto
- 4 m
- Lapad ng kuwarto
- 3.5 m
- Taas ng kisame
- 2.4 m
- Taas ng luminaire mula sa sahig
- 0 m
- Working plane
- 0 m
- Target illuminance
- 0 lx
- Lumens kada luminaire
- 800 lm
- Watts kada luminaire
- 9 W
- Beam angle
- 90 °
- Reflectances, kisame / dingding / sahig
- 70/50/20 %
- Luminaire maintenance factor mula sa Table 14.4
- Sariling factor
- Maintenance factor
- 0.8
Mga luminaire
6
- Grid
- 3 × 2
- Espasyo sa haba
- 1.33m
- Espasyo sa kabila
- 1.75m
- Illuminance na ibinibigay ng layout
- 156lx
- Lighting power density
- 3.86W/m²
Design aid lang ang resultang ito. I-verify ito laban sa kasalukuyang standard.
Mga hakbang ng kalkulasyon
- Lawak ng sahig14m²
- Target illuminance150lx
Typical design value. Not a standard’s value.
- Working plane0.7m
AS/NZS 1680.1:2006 Table 3.2
- Taas ng luminaire2.4m
The ceiling
- Taas sa ibabaw ng working plane1.7m
- Room index
K = L × W / (Hm × (L + W))
1.1 - Utilisation factor0.57
Typical value for a direct luminaire. Use the maker’s table when you have it. Reflectances 70/50/20 %.
- Maintenance factor0.8
- N = E × A / (Φ × UF × MF)5.76
- Grid3 by 2
- E' = N' × Φ × UF × MF / A156lx
- Spacing sa height, pinakamalaki1.03
Spacing to height ratio for even light. Typical.
- Lighting power density3.86W/m²
Tungkol sa calculator na ito
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.
Mga tanong
Design aid ang resulta. I-verify ito laban sa kasalukuyang standard.
Ano ang ginagawa ng Lighting Lumen Method tool?
Hinahanap nito kung ilang luminaire ang kailangan ng room para sa target illuminance. Ang bilang ay ang target na pinarami sa floor area. Hinahati ito sa lumens ng isang luminaire at sa dalawang factor. Inilalatag ng tool ang bilang bilang grid at tinitingnan ang spacing laban sa mounting height.
Saan galing ang target lux?
Para sa workplace room, gaya ng office o warehouse, ang AS/NZS 1680.1:2006 Table 3.1 ang binabasa, at pinangalanan ito ng step. Ang mga kuwarto ng bahay, pati ang kusina at garahe, ay nasa AS/NZS 1680.2 series, na wala sa AmpSize. Gumagamit sila at ang mga outside area ng karaniwang values, at sinasabi ito ng tool. Ang 240 lx ng Table 3.1 ay para sa workplace food preparation.
Ano ang utilisation factor?
Ito ang bahagi ng liwanag ng lamp na umaabot sa working plane. Binabasa ng tool ang karaniwang value para sa direct luminaire. Gumagamit ito ng room index at ng reflectance ng kisame, pader at sahig. Gamitin ang table ng maker kapag mayroon ka: piliin ang Own utilisation factor at i-type ang value.
Saan galing ang maintenance factor?
I‑type ang sarili mong figure, o kunin ang luminaire maintenance factor mula sa AS/NZS 1158.1.2:2010 Table 14.4. Hindi kasama sa table na iyon ang lamp lumen depreciation. Kaya hinihingi ng tool ang lamp lumen maintenance factor mula sa data sheet: ang L80 rating ay katumbas ng 0.8. Ang maintenance factor ay ang product ng dalawa.
Mga worked example
Background
Mga clause at table na binabasa ng tool na ito
- 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
Bawat clause at table, kasama kung paano ito na-verify
Huling na-check ang mga table noong 1 Oct 2026.
Mga kaugnay na tool
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