# Lighting design notes: open office, level 2

## Goals

- Melanopic EDI of at least **250 lx** at the eye (1.2 m seated) from 9:00 to 13:00
- Horizontal illuminance of **500 lx** on desks, uniformity 0.6 or better
- UGR below 19 at every workstation
- Evening dim-down to **2700 K** and 30% after 18:00

## Fixture layout

| Zone | Fixture | Qty | Mounting |
| --- | --- | ---: | --- |
| Desks | Circadian Sky 2x4 (CS24) | 12 | Lay-in, 1200 x 600 mm grid |
| Meeting room | Circadian Sky 2x2 (CS22) | 4 | Lay-in |
| Corridor | Circadian Sky 1x4 (CS14) | 6 | Surface mount |
| Reception | Virtual Sun A7 | 1 | Recessed |

## Control sequence

1. Sunrise ramp starts 30 minutes before occupancy.
2. Midday hold at 6500 K and full output.
3. Afternoon fade toward 4000 K from 15:00.
4. Evening scene: 2700 K, 30%, from 18:00.

```text
06:30  2700K  15%
09:00  5500K 100%
12:00  6500K 100%
15:00  5000K  90%
18:00  2700K  30%
```

> Check glare from the Virtual Sun in reception against the sightlines from the entrance.