Office lighting has changed fundamentally as work has moved from paper-based tasks to self-luminous screens. The lighting system must now support reading, writing, communication and movement while avoiding reflections, excessive contrast and conditions that make display screen work unnecessarily tiring.
Paper reflects light and becomes easier to read when sufficient light reaches its surface. A display screen produces its own light, so adding more room light does not necessarily improve visibility and may instead reduce contrast by creating reflections or washing out dark content.
Traditional office layouts often assumed that a relatively uniform horizontal light level across desks would support most tasks. Screen-based work requires greater attention to where light comes from, what is visible in the screen, how bright nearby surfaces appear and whether the user can adjust the immediate environment.
Comfort depends partly on the relationship between screen brightness and the surrounding field of view. A bright screen in a dim room can feel harsh, while a dim screen against bright windows or illuminated surfaces may be difficult to read. Screen settings and room lighting should therefore be considered together.
Paper has not disappeared, and many workstations involve mixed tasks. Lighting should support documents, keyboards, handwritten notes and screens without assuming that the condition best suited to one task will suit every other task.
Reflections occur when bright objects or surfaces are visible in the screen. They may appear as distinct images of luminaires or windows, or as a general veil that reduces contrast. Glossy screens and dark content tend to reveal reflections more strongly than matt screens and bright content.
A screen facing a window may place a bright exterior scene behind the display, creating a large contrast between the screen and its background. A window behind the user may be reflected directly. Side-on positioning often gives greater control, although blinds, glazing, room geometry and seasonal sun angles still affect the result.
Ceiling luminaires can also enter the screen-reflection zone. This is the range of angles from which light is likely to be reflected towards the user by the screen surface. Luminaire luminance limits within that zone are used as a design concept to restrict the brightness of reflected fittings, especially where screens are glossy, dark or used for visually demanding work.
Screen height, tilt and viewing distance affect comfort, but posture and screen-position guidance belongs to ergonomic assessment rather than lighting design. A lighting survey should instead record screen orientation, window position, luminaire layout, blind use and the content conditions under which reflections are most apparent.
Open-plan offices require lighting to serve many users, tasks and viewing directions at the same time. Desks may face different orientations, circulation routes pass through the working area and furniture changes can place screens beneath luminaires intended for another layout.
A uniform ceiling system can simplify coverage but may offer limited adaptation to individual needs. Brightness acceptable to one person may be uncomfortable to another, particularly where users have different screen types, visual tasks or sensitivities. Zoning and local control can reduce the need to set an entire floor according to one difficult position.
Cellular offices allow more control over orientation and switching because fewer users share the space. Problems can still arise where a single window dominates the field of view, a desk is fixed in an unsuitable position or a bright luminaire is close to the normal line of sight.
Hot-desking removes the stable relationship between a person, a task and a workstation. A desk that works well for one screen, seating position or time of day may be unsuitable for another user, so flexible offices benefit from repeatable controls and layouts that remain acceptable as users and equipment change.
Individual control allows occupants to adjust light in response to screen brightness, document work, daylight and personal preference. This may involve local dimming, switched zones, task lighting or blind control, provided that adjustments do not create glare or leave neighbouring work areas inadequately lit.
Dimming is most useful when it changes light smoothly and predictably. Controls should be easy to understand, and automatic systems should not create frequent or unexpected changes that distract occupants during concentrated work.
Local task lighting can support paper reading or detailed work without increasing the brightness of the entire office. It should be positioned so that it does not reflect in the screen, cast strong shadows across documents or place a bright source in the direct field of view. The separate page on task lighting explains that subject in detail.
In an open-plan area, one person's preferred setting can affect many others, so zoning and local adjustment are generally more workable than a single control for a large floor. In a cellular office, individual control can be more direct because the setting is less likely to affect adjacent users.
Screen work increasingly includes video meetings and remote collaboration. Horizontal illuminance on the desk does not describe how well faces are lit because faces are predominantly vertical surfaces.
Adequate vertical illumination helps facial features appear clear and natural. Light arriving mainly from above can create shadows around the eyes and beneath the chin, while strong light behind the person can cause the camera to darken the face. Balanced light from the room and controlled daylight is generally more useful than relying on screen glow or a small bright source.
Video-call appearance is not purely cosmetic. Clear facial visibility supports expressions, lip reading and social interaction. Lighting intended to improve the face should nevertheless avoid direct glare, reflections in spectacles and excessive contrast between the person and the background.
A lighting survey may include observations from the camera position as well as from the user's eyes. This can reveal an underlit face, strong shadowing or a much brighter background even when desk illuminance appears satisfactory.
In the Emirate of Abu Dhabi, workplace lighting is a mandatory matter. ADOSH-SF Code of Practice 8.0, General Workplace Amenities, Version 4.0, effective 15 July 2024, applies to all employers within the Emirate of Abu Dhabi and sets a minimum illumination intensity of 30 foot-candles for offices and general work areas, approximately 323 lux.
ADPHC's Technical Guideline Ergonomics in an Office Environment, Version 4.0, July 2024, recommends between 30 and 50 foot-candles, or 300 to 500 lux, for office and screen work. It also addresses glare control and task lighting, but ADPHC classifies Technical Guidelines as non-mandatory.
The distinction matters when a report is interpreted. The Code of Practice establishes a mandatory Abu Dhabi minimum, while the Technical Guideline provides non-mandatory ergonomic guidance. A result may therefore require separate discussion as a compliance matter and as a visual-comfort matter.
EN 12464-1:2021 and ISO/CIE 8995-1:2025 are consensus technical references used internationally and may be specified contractually, but they are not statutory in the UAE unless adopted by an instrument. An office assessment should consider measured illuminance together with reflections, glare, screen orientation, daylight, vertical light and occupant control.
In the Emirate of Abu Dhabi, workplace lighting is a mandatory matter. The Abu Dhabi Public Health Centre states that Codes of Practice under the ADOSH-SF framework are mandatory to all entities regardless of risk classification, and ADOSH-SF Code of Practice 8.0, General Workplace Amenities, Version 4.0, effective 15 July 2024, applies to all employers within the Emirate of Abu Dhabi. Its Section 3.8 sets minimum illumination intensities of 30, 10 and 5 foot-candles according to area type, which the Code itself converts at approximately 10.764 lux to the foot-candle. ADPHC's Technical Guideline on ergonomics in an office environment adds recommendations for office and screen work and is classified as non-mandatory. At federal level, MOHRE Administrative Decision No. 19 of 2023, Article 4(c), places lighting duties on employers within MOHRE's jurisdiction, including a requirement for emergency lighting when the primary system fails. EN 12464-1 and ISO/CIE 8995-1 are consensus standards: widely used and often specified contractually, but not statutory in the UAE unless an instrument adopts them. A requirement binding only in the Emirate of Abu Dhabi is not UAE law and must not be described as such.
ADOSH-SF Code of Practice 8.0 — General Workplace Amenities, V4.0 (15 July 2024), Section 3.8; MOHRE Administrative Decision No. 19 of 2023, Article 4(c)
High room brightness does not always improve screen visibility. Reflections, bright windows and illuminated surfaces can reduce the apparent contrast of the display, particularly when dark content or a glossy screen is used.
Facing a window can place a bright exterior scene behind the screen and create a large contrast in the field of view. A window behind the user may be reflected in the screen, so a side-on arrangement with suitable daylight control is often easier to manage.
The screen-reflection zone is the range of angles from which luminaires or other bright sources can be reflected by the screen towards the user. Controlling luminaire brightness in this zone reduces distracting images and veiling reflections.
No. ADPHC classifies its Technical Guidelines as non-mandatory. The guideline recommends 30 to 50 foot-candles, or 300 to 500 lux, for office and screen work, while the mandatory Abu Dhabi requirement is contained in ADOSH-SF Code of Practice 8.0.
A single setting may not suit every user because screen types, tasks, visual preferences and daylight conditions differ. Zoning, dimming and local control make it easier to adapt a shared office without changing the whole floor.
Faces are mainly vertical surfaces, so desk-level illuminance does not show how well they are lit. Balanced vertical illumination improves facial visibility while reducing deep shadows and strong contrast with the background.