#03Lux / Lighting Verification Report
Multi-Asset / Multi-Point Equipment Schedule
Inspect multiple transformers, panels, rooms, motors, or RCDs in this module without overwriting previous assets. Each item receives a permanent QR Sticker UID preserved across annual audits.
Sticker UID: OC-LIGH-AECAStandard Limits, Equations & Space Presets
EN 12464-1:2021 Indoor Workplace Lighting schedules: required maintained illuminance Em, minimum uniformity Uo, Unified Glare Rating limit R_UGL, Colour Rendering Ra, and Room Index K measurement grid sizing.
Uo = Emin / Eavg
Illuminance uniformity on the task area; must meet the space class limit (0.40, 0.60, or 0.70) and cannot exceed 1.00.
K = (L x W) / (Hm x (L + W))
Determines minimum number of lux grid measurement points N_min (4, 9, 16, or 25 points) per EN 12464-1 §4.4.1.
LPD = P_total / (L x W) [W/m2]
Installed Lighting Power Density and normalized efficiency W/m2 per 100 lx (EN 15193-1).
EN 12464-1:2021 Normative Indoor Workplace Illuminance Schedule
EN 12464-1:2021 Section 5 & ANSI/TIA-942| Ref Clause | Zone / Activity / Room Type | Maintained Em (Lux) | Min Uniformity Uo | Max Glare R_UGL | Min CRI Ra |
|---|---|---|---|---|---|
| 5.1.1 | Corridors and circulation areas | 100 lx | 0.40 | 28 | 40 |
| 5.1.2 | Stairs, escalators, loading ramps | 150 lx | 0.40 | 25 | 40 |
| 5.25.2 | Electrical switchrooms, plant & generator rooms | 200 lx | 0.40 | 25 | 60 |
| 5.25.4 | Control rooms & switchboard control desks | 500 lx | 0.60 | 19 | 80 |
| 5.26.1 | Filing, copying, reception counter | 300 lx | 0.40 | 19 | 80 |
| 5.26.2 | Writing, typing, reading, VDT office workstations | 500 lx | 0.60 | 19 | 80 |
| 5.26.3 | Technical drawing / CAD design stations | 750 lx | 0.70 | 16 | 80 |
| 5.26.4 | Conference and meeting rooms | 500 lx | 0.60 | 19 | 80 |
| 5.29.1 | Store rooms, cold stores, bulk warehouse aisles | 100 - 200 lx | 0.40 | 25 | 60 |
| 5.10.2 | Rough mechanical / electrical assembly (cables, transformers) | 300 lx | 0.60 | 25 | 80 |
| 5.10.4 | Fine electrical assembly (control panels, switchgear wiring) | 750 lx | 0.70 | 16 | 80 |
| 5.10.5 | Precision electronic workshops, PCB inspection | 1000 lx | 0.70 | 16 | 90 |
| TIA-942 | Data center server hall (1 m above floor in aisle) | 500 lx | 0.60 | 19 | 80 |
Minimum Illuminance Measurement Grid Points by Room Index K (EN 12464-1 §4.4.1)
EN 12464-1:2021 §4.4.1| Room Index K = L·W / [Hm·(L+W)] | Min Grid Layout | Min Number of Measurement Points |
|---|---|---|
| K < 1.0 | 2 x 2 symmetrical grid | 4 points minimum |
| 1.0 <= K < 2.0 | 3 x 3 symmetrical grid | 9 points minimum |
| 2.0 <= K < 3.0 | 4 x 4 symmetrical grid | 16 points minimum |
| K >= 3.0 | 5 x 5 symmetrical grid | 25 points minimum |
Exclude a 0.5 m border strip from walls unless the task area extends to the wall.
Measured Inputs
Calculated / Evaluated Results
Select the EN 12464-1:2021 space category (or click a preset in the Standard Annex drawer above) to automatically set the required maintained illuminance Em, uniformity U0 = Emin / Eavg, glare limit UGR_L, and CRI Ra. Enter room dimensions L, W, Hm to verify the mandatory EN 12464-1 §4.4.1 measurement grid point count from Room Index K.
Pending / Not tested — results stay neutral until valid measured values are entered.
- Pending
Maintained Illuminance Em (Office Zone Target >= 500 lx)
-
Not tested - enter the measured value. Acceptance: Eavg >= 500 lx maintained illuminance for the selected EN 12464-1 space [EN 12464-1:2021 Section 5]
- Pending
Uniformity U0 = Emin / Eavg (Target >= 0.60)
-
Not tested - enter the measured value. Acceptance: 0.60 <= U0 <= 1.00 across the task/activity area [EN 12464-1:2021 §4.3]
- Pending
Unified Glare Rating UGR (Target <= 19)
-
Not tested - enter the measured value. Acceptance: R_UGL <= 19 for the selected task class [EN 12464-1:2021 §4.5]
- Pending
Colour Rendering Index Ra (Target >= 80)
-
Not tested - enter the measured value. Acceptance: Ra >= 80 for the selected interior zone [EN 12464-1:2021 §4.6]
- Pending
Room Index K & Measurement Grid Point Adequacy (EN 12464-1 §4.4.1)
-
Not tested - enter the measured value. Acceptance: K < 1 -> 4 pts; 1 <= K < 2 -> 9 pts; 2 <= K < 3 -> 16 pts; K >= 3 -> 25 pts [EN 12464-1:2021 §4.4.1]
- Pending
Lighting Power Density (LPD) & Normalized Efficiency
-
EN 15193-1 / ASHRAE 90.1 energy efficiency benchmark (LED office target <= 2.5 W/m2 per 100 lx).
Verification Checklist (0 / 11)
1Measurement grid laid out per Room Index K (excluding 0.5 m wall border strip) [EN 12464-1 §4.4.1]
2Lux meter cosine and V(lambda) spectral response corrected with valid calibration certificate
3Extraneous daylight excluded (night survey or blinds closed) or ambient baseline subtracted
4Luminaires aged >= 100 h and thermally stabilised prior to photometric readings
5Workplane measurement height verified (0.75 m sitting task, 0.85 m standing, 0.0 m floor circulation)
6Immediate surrounding area illuminance verified in accordance with EN 12464-1 Table 1
7Surface reflectances within normal range (ceiling 0.7-0.9, walls 0.5-0.8, floor 0.2-0.4)
8No disability or veiled reflection glare observed on VDT screens / control panels
9Temporal light modulation (flicker PstLM <= 1.0 & stroboscopic SVM <= 0.4) verified on rotating machinery
10Failed, dimmed or colour-shifted LED modules/drivers logged for maintenance replacement
11As-built floor plan annotated with grid coordinates and point-by-point lux values
General Notes
Free plan: 5 of 5 inspections / calculations left this month.