Choosing a LED module: P2, P2.5, P3, P4, P5, P6, P8 and P10 compared

When you plan a LED video wall, one of the most important decisions is the pixel pitch of the module. The number after the P gives the distance in millimetres between the centres of two neighbouring pixels: the smaller that value, the denser the resolution and the closer you can stand and still see a sharp, undistorted image. The most common options on the market are P2, P2.5, P3, P4, P5, P6, P8 and P10, and each has its ideal field of use. A simple international rule of thumb says that every 1 mm of pixel pitch corresponds to roughly 1 metre of comfortable minimum viewing distance, so a P4 module looks sharp from about 3-4 metres. In this article we work through each module type so you can see exactly which suits your project and which mistakes to avoid during procurement.

We start with concrete numbers, because these are what really decide the choice: a P2.5 module holds around 62,500 pixels per square metre, while a P10 holds only about 10,000. That difference in density directly determines the price too - a denser module can cost two or three times as much per square metre as one with a coarser pixel layout. So there is no point automatically choosing the finest pitch if viewers never stand closer than two metres to the wall - that is a needless cost, and a good site survey with expert advice will filter it out early in the design.

P2 and P2.5 - champions of close viewing

P2 and P2.5 modules are designed for places where viewers look at the screen from one or two metres, sometimes closer. Typical uses are a meeting-room video wall, a studio backdrop, a flagship store window or a reception design feature. The dense pixel layout makes the image almost photographic in sharpness, but manufacturing and component costs are higher too, so the price per square metre exceeds that of coarser-pitch modules. It is worth knowing that at this density the load on the controller card and the power supply is also greater, so system design must account for it - an under-specified power feed here quickly costs you resolution and brightness.

P3 and P4 - the most popular middle ground

P3 and P4 modules represent the widest slice of the market today, because they strike an excellent compromise between price and image quality. These are what you most often see on the LED video walls of restaurants, shops, event spaces and conferences, where viewers typically watch from 2-5 metres. The P4 module is somewhat cheaper than P3, and in larger spaces, where the audience does not stand directly in front of the wall, it involves no compromise in quality at all. If you are torn between P3 and P4, it is worth reading our detailed comparison, which sets the two against each other through concrete examples before you commit to a purchase.

P5 and P6 - events and larger halls

P5 and P6 modules are typically used in larger event halls, at exhibitions and in business environments where the viewing distance already exceeds 5-6 metres. These modules are also widespread in cabinet form, because they make up an easily assembled modular system with which a large video wall can be built and struck quickly. Their coarser pixel layout also makes them more economical to run than a denser module of the same size, which can mean significant savings in long-term operation, particularly with several hours of continuous use a day.

P8 and P10 - the world of large outdoor displays

P8 and P10 modules are designed primarily for large outdoor surfaces where viewers see the display from 10-20 metres or more: think of stadiums, roadside billboards or city-centre building facades. Here the coarser pixel layout is no disadvantage, since at that distance the eye merges the pixels into a continuous image anyway. In return, these modules can deliver far higher brightness - outdoors, a minimum of 4,500-5,000 nits with automatic brightness control is essential for content to remain visible in direct sunlight, while indoors 600-1,000 nits is perfectly sufficient.

Differences between outdoor and indoor modules

Alongside the P value, it matters just as much whether you choose an outdoor or an indoor build. Outdoor modules carry IP65 or higher protection and withstand rain, dust and temperature swings - a critical consideration in a continental climate where summer heat above 35 degrees Celsius and sub-zero winter cold both occur. Indoor modules, by contrast, do not need that level of protection but offer a finer pixel layout and better contrast ratio in enclosed spaces. A frequent buyer error is fitting an indoor module in a covered but open space - a passageway or a rooftop display case - where humidity and temperature swings still put serious strain on the electronics.

Will it be cheap rubbish? The question of quality

One of the most common worries customers bring to us is that a low-quality, no-name LED module will undermine the investment. That is a fair concern, because the market genuinely does contain modules assembled from mixed production batches with poor chips, which show colour variation and pixel faults after only a few months. That is why we only fit LED chips of named, verified origin, put every module through our own quality control before installation, and use bin-matched LEDs - all from a single production batch - on any one wall, so the colours stay consistent over the long term. The modules we install are typically designed for 100,000 hours of service, which at 12 hours of operation a day means more than 20 years before brightness falls to half its initial value.

Expert tip: do not look only at the P value

Many people focus solely on pixel pitch when choosing a module, yet the module construction, the type of LED chip used (SMD, or the increasingly popular COB technology outdoors), the sizing of the support structure and the capacity of the power feed matter just as much. An under-specified support structure or power supply can cause problems even with the best module, because the wall does not receive a stable, even supply, which leads to flicker or uneven brightness. That is why we recommend treating module selection together with a site survey and complete system design, rather than as an isolated item - with us that runs from survey to installation in one pair of hands, as one team's responsibility.

It breaks and there is no service - the question of repairability

The other very common fear is that the LED video wall will fail and there will be nobody to supply parts or service, because the manufacturer is overseas or the importer disappears from the market. We manage that risk by working with our own service backing and by keeping the most commonly replaced modules and parts in stock, so a pixel fault or module failure does not mean waiting weeks for an overseas shipment. Modern LED video walls are modular, which means replacing a faulty module takes only a few minutes and on most systems can be done from the front - this is what front service means, and it is exactly what buyers often forget to ask about, even though over the long term it determines what the wall costs to operate.

Full-colour and single-colour modules

Alongside modules that display the full RGB colour range, there are single-colour modules, typically built from red or white LEDs, used mainly for scrolling text, simple price information or attention-grabbing lettering - the kind of content a LED message sign carries. These are significantly cheaper than their full-colour counterparts and consume less energy, since only one LED group has to be driven per pixel. If you only want to display text information or simple graphics - a bakery's daily range, or a pharmacy's opening hours - it is worth considering whether you really need the more expensive full-colour solution, or whether a simpler LED message sign will do the job.

Common mistakes worth avoiding

Buyers run into the same mistakes repeatedly during module selection. The most common is choosing too fine a pixel pitch for a location where nobody views the wall from closer than 3-4 metres, which needlessly inflates the cost of the investment. Another typical error is an under-specified support structure or power feed, which leads to failures and uneven brightness over the long term. It is also common to buy a no-name module from mixed production batches at a lower price and then discover six months later that parts of the wall are ageing differently and visible colour differences have developed across the panels. Finally, many forget about ingress protection in outdoor or semi-outdoor positions, and about serviceability - whether the wall can be opened from the front to repair a pixel fault.

How to choose for your own project

Always start module selection from the viewing distance: the rule of thumb is that the pixel pitch in millimetres should roughly equal the closest distance in metres from which viewers see the wall — about that for moving image, a little coarser for plain text and logos, finer for live sport. Also take account of the light conditions at the site, the available budget, and whether the wall will show static content or fast-moving images, because the latter may call for a control system with a better refresh rate - ideally at least 3,840 Hz where the wall will be filmed. If you are not sure of the decision, the best route is to consult a specialist during a free site survey, who will give a precise recommendation based on the site conditions, the light and the viewing angles before you order anything.

What it costs and what the price includes

Many people equate the price of a LED video wall solely with the module price per square metre, yet the total is made up of far more items: alongside the modules there are the support structure, the control system, the labour for installation and in many cases the handover briefing. In a transparent quote these items appear on separate lines, so you can see exactly what the panel costs and what the associated infrastructure costs. We always give a detailed, itemised quote so there are no surprises at the end of the project, and the warranty and any optional extended warranty packages appear in the offer too, so you know in advance what to expect in the event of a fault.

Summary

Choosing a LED module is not a matter of settling on a single number, but of weighing viewing distance, light conditions, indoor or outdoor position, ingress protection and budget together. P2-P3 modules serve close-range, premium presentation; P4-P6 suit event-hall and business use; and P8-P10 are best for long-distance outdoor communication. A well-chosen module of reliable origin will serve dependably for years, even a decade, while a badly matched or questionable choice results either in needless cost, or in poor image quality, or in early failure. If you are unsure, ask for a free site survey and we will help you handle everything from survey to installation and briefing from a single source.