Office lighting should be chosen for the work being done and the actual premises: whether desks receive enough light, screens have distracting reflections and brightness varies too sharply. The number or wattage of luminaires and the presence of large windows do not establish lighting quality. An informed decision needs a workstation plan, lighting calculations and, after installation, measurements to check the result.<\/p>\n
The key is to assess the person's working position, not an attractive ceiling. This guide covers daylight and electric light, lux and lumens, UGR, luminaire selection and questions to ask before buying or fitting out an office.<\/p>\n
The cover is a conceptual illustration of office lighting, not a photograph of F-375 or confirmation of a particular property's specifications.<\/p>\n
Begin with the tasks: screen work, reading documents, discussions around a table, video calls and examining samples. Then mark permanent workstations, windows, partitions and tall furniture. Light suitable for a circulation route may not suit reading a drawing, while a bright pendant above a desk may be reflected in the monitor.<\/p>\n
The furniture layout and lighting need to be checked together. If desks move after the calculation, its conclusions may no longer describe the working conditions. Our guide to types of office layouts<\/a>explains cellular, open-plan and mixed arrangements; this article focuses specifically on light.<\/p>\n Lux measures illuminance on a surface, lumens measure luminous flux and watts measure power. Two luminaires with the same wattage therefore need not produce the same light on a desk. Light distribution, mounting height, positioning, finishes and obstructions all affect the result. Adding up the lumens on packaging and dividing by floor area is not enough for a final selection.<\/p>\n In Russia, workplace lighting requirements are considered alongside hygienic standards, room use and the visual task. The applicable editions of the relevant documents inform the brief. GOST R 55710-2013 addresses electric lighting of indoor workplaces and measurement methods; sanitary requirements need separate consideration and are not replaced by a luminaire data sheet.<\/p>\n A figure in an online table is not automatically the requirement for every office. Establish the task, assessment surface, lighting conditions and other quality parameters. The person preparing the calculation should state the requirements adopted and the reasons for them. A compliance assessment requires an applicable method, not the impression that a room looks bright.<\/p>\n Windows provide changing daylight. Its amount and direction depend on time, weather, surroundings and workstation position. Panoramic glazing can be an office's strength without guaranteeing comfort at every desk: strong reflections may occur near the fa\u00e7ade, while deeper areas may receive less light.<\/p>\n Electric lighting should also be assessed when daylight does not contribute. Compare daytime and evening scenarios rather than judging premises only during a sunny viewing. Shading should allow light to be managed without keeping the room completely dark. Installing or changing blinds, films and other solutions needs consideration of the particular building and glazing, with the necessary agreement.<\/p>\n First identify the source: a window, an exposed luminous surface, a reflected ceiling light or a shiny finish. Sit at the intended desk and view the screen from the normal working position. A photograph taken from the aisle does not show what the user sees.<\/p>\n Possible measures include changing the relationship between screen and window, adjusting shading, redirecting light or changing a reflective surface. Direct a desk lamp towards documents rather than the display. Adjust screen brightness to the surroundings. If reading requires constant twisting or completely covering the window, reconsider the arrangement rather than simply installing a more powerful luminaire.<\/p>\n General lighting and a task lamp serve different purposes. Extra light on paper should not introduce a new reflection or a sharp contrast with the adjacent area. Make the final check with the actual screens, furniture and arrangement, not just an empty floor plan.<\/p>\n UGR is used to assess discomfort glare from a lighting installation. The method takes account of the observer's position and viewing direction. Tabulated luminaire data are produced for stated assumptions: they are not a universal guarantee against glare in any room.<\/p>\n Ask for the input data and a calculation using the actual geometry. Where will people sit? Which luminaires will be visible when looking at a screen or another person? What changes after a partition is installed? Comparing two advertised UGR values is not enough. Direct glare from a luminaire and a window reflected in a monitor are not the same problem either.<\/p>\n Once the tasks are defined, compare light distribution, glare-control options, colour rendering, flicker, control compatibility and maintenance arrangements. Colour temperature describes appearance but does not replace the other characteristics. No single temperature automatically delivers comfort for every person and task.<\/p>\n Request technical documentation and calculation data. Establish warranty conditions, access for maintenance and whether components can be replaced. An attractive decorative fitting and a task-lighting luminaire may have different roles. Do not select the whole system by housing shape, wattage or promises of \u201cfatigue-free light\u201d.<\/p>\n Sensors and control scenes can change operating modes but do not correct poor luminaire positioning. Our smart office<\/a>guide also explores this distinction: automation is useful once the tasks and the quality of the working environment itself are understood.<\/p>\n A tall cupboard can obstruct light, an opaque partition can change its distribution and a glass partition can introduce reflections. During refurbishment, the lighting design therefore needs to match the current layout and finishes. Our guide to office fit-out<\/a> explains the wider preparation process; lighting belongs within the coordinated design, rather than being added as an afterthought.<\/p>\nLux, lumens and watts: what to compare<\/h2>\n
\n\n
\n \nParameter<\/th>\n What it shows<\/th>\n What to check in the office<\/th>\n<\/tr>\n<\/thead>\n \n Illuminance, lx<\/td>\n Light falling on a selected surface.<\/td>\n Working planes and different points, not just the centre of the room.<\/td>\n<\/tr>\n \n Luminous flux, lm<\/td>\n A characteristic of the light emitted.<\/td>\n How the chosen optics distribute the flux and deliver it to workstations.<\/td>\n<\/tr>\n \n Power, W<\/td>\n The equipment's electrical power.<\/td>\n Consumption across the system and the conditions used to compare models.<\/td>\n<\/tr>\n \n Colour temperature, K<\/td>\n The appearance of white light.<\/td>\n Suitability for the task and consistency between nearby sources.<\/td>\n<\/tr>\n \n UGR<\/td>\n A calculated assessment of discomfort glare under stated conditions.<\/td>\n Luminaire positions, viewing direction and calculation assumptions.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n Which lighting requirements apply to an office?<\/h2>\n
Daylight and electric lighting work together<\/h2>\n
How to reduce reflections on a monitor<\/h2>\n
Why a \u201clow UGR\u201d label is not enough<\/h2>\n
How to choose office luminaires<\/h2>\n
Partitions, fit-out and changes to the layout<\/h2>\n