P4 vs P5 LED video wall: which one, and at what distance?

The difference between a P4 and a P5 LED video wall comes down to a single number: pixel pitch, the distance between neighbouring pixels. It is 4 mm for P4 and 5 mm for P5. As a rule of thumb, the comfortable minimum viewing distance in metres roughly matches the pitch value in millimetres, so around 4 metres for P4 and around 5 metres for P5. Closer than that and individual pixels can become visible; further away the two types look practically identical in sharpness. That is why it makes no sense to reach automatically for the finer, more expensive P4 when the viewing distance does not justify it.

On price, P4 typically carries a higher cost per square metre at the same wall size, because it needs roughly 1.5 to 1.6 times as many pixels, a denser LED layout and more processing power than P5. In practice this means that if viewers meet the wall from more than five or six metres - on a facade or across a car park, say - choosing P5 saves a significant amount without any perceptible loss in the visual result.

Resolution at the same size

On a wall of a given physical size, P4 holds more pixels than P5 because the dots sit closer together. On a 3 x 2 metre wall, for example, P4 delivers substantially higher resolution than P5, so it shows finer detail, smaller text and a sharper image. If your content includes a lot of small detail or small type, the advantage of P4 is visible, particularly from close up.

Ideal viewing distance

As a rule of thumb, the minimum comfortable viewing distance in metres roughly equals the pixel pitch measured in millimetres: about 4 metres for P4 and about 5 metres for P5 as an ideal minimum. Closer than that, individual pixels can become visible; further away, both walls look equally sharp. So the first question in the choice is always how far away the wall will be viewed from - and a free site survey can establish that precisely.

Indoor or outdoor

Both P4 and P5 are available in indoor and outdoor builds. Indoors, for closer viewing, the choice more often falls on P4 because of the finer image. Outdoors, where the viewer is typically further away - on a building facade or across a car park - P5 (or a larger pitch) is more than sufficient and more cost-effective. In an outdoor build, brightness (above 5,000 nits as a guide) and waterproofing (IP65 at minimum) are also decisive, so never choose an indoor-rated panel for outdoor use, even if the pitch looks right.

Price and cost-effectiveness

A P4 wall costs more at the same size because it requires more pixels, a denser LED layout and more processing power. P5 is therefore a good compromise where viewing distance allows: it gives a similarly good image from further away at a lower price. Over-specifying is a common mistake - if the viewer is going to be 6-8 metres away anyway, they will not see what the P4 premium bought, and it only raises the cost. Expert tip: ask for a quote where the supplier recommends a pitch sized to your actual viewing distance on the basis of a site survey, rather than defaulting to the most expensive or the cheapest option. A well-chosen pitch not only reduces the purchase price but can also improve running costs over the long term, since fewer LEDs have to be driven and cooled over the same surface.

Content and use

For conference rooms, retail spaces and studio backdrops, where you work at close range with fine detail, P4 (or an even smaller pitch) is the right choice. For advertising walls, facades, event spaces and sports grounds, where the viewer is further away and impact is what matters, P5 offers the ideal balance of price and quality. The type of content and the typical viewing distance together decide the choice. If you are uncertain what content you may want to display in future, discuss both current and expected future needs with the designer, because that can affect which pitch offers a more flexible solution over the longer term.

Common mistakes when choosing a pitch

The most frequent buyer mistake is choosing a needlessly fine pitch: many follow the logic that smaller is always better and pick P4 or finer even when viewers actually meet the wall from 8-10 metres, where the difference is barely perceptible to the naked eye. Another common error is designing the support structure and the power feed without knowing the final size and weight, and under-specifying them - which can mean serious retrofit costs and a safety risk later. It is worth matching the entire system, not just the panel, to the final pitch and size at the design stage.

How to decide

The decision rests on three questions: how far away the wall will be viewed from, how detailed the content is, and what the budget is. If the viewer is within 4-5 metres and fine detail matters, choose P4. If the typical distance is above 5 metres, P5 is more economical and visually all but equivalent. When in doubt, a configurator or a free site survey will calculate the right pitch for the location precisely.

How long does a P4 or P5 wall last?

With good-quality LEDs and adequate cooling, both builds can be designed for around 80,000-100,000 hours of service, which is 15-20 years even at 10-12 hours of use a day. Pixel pitch in itself does not affect lifespan - that depends more on the LED technology (SMD, COB), the quality of the chip manufacturer and how the power supply is specified, rather than on whether the pixel spacing is 4 or 5 mm.

I will not be able to operate it - really?

Many buyers worry that a finer-resolution P4 wall with many more pixels demands more complicated operation than a larger-pitch P5. In reality day-to-day operation - changing content, adjusting brightness, setting a schedule - is done with the same simple software or app regardless of pixel pitch. If you can write an email and upload a file, you will handle this interface confidently after a short briefing.

Is there anything between P4 and P5?

Yes. Products with P3.91, P4.81 or pitches specifically between P4 and P5 are available if neither standard value fits your location exactly. These often sit in a similar price band to the adjacent standard pitch, so an intermediate solution is not always worth chasing. An experienced designer will more often suggest choosing between the proven P4 and P5 and adjusting the viewing distance or the size to suit, because that also means simpler procurement and maintenance in the long term.

Expert tip: do not judge from the catalogue image

In a photograph or a catalogue, the difference between P4 and P5 is all but invisible, because product shots are always taken from close up under controlled lighting. What matters far more for a real decision is that your own site is taken into account - the actual viewing distance, the light conditions, the nature of the content. Ask for a sample or an on-site demonstration if you can, so you can see with your own eyes whether the pitch really works from the distance you have in mind.

What does P4 cost to run compared with P5?

Because a P4 wall holds more LEDs per square metre, its consumption at the same brightness setting can be slightly higher than that of a P5 wall. In practice this difference is small within total running costs, because in both builds automatic brightness control and operating hours matched to the time of day are the decisive factors, not pixel density on its own. Running cost is therefore not a primary consideration in choosing between P4 and P5 - viewing distance and purchase price matter far more.

What to ask the supplier when requesting a quote

When requesting a quote, state the planned location, the approximate viewing distance and the nature of the content (text, images, video, fine detail), because from those the supplier can say precisely whether P4 or P5 better suits your requirement. Ask too whether the quote includes the support structure, the installation and the warranty, since only then can you genuinely compare the total cost of a P4 and a P5 build rather than just the panel price per square metre. Do not hesitate to ask several questions, by phone or as part of a free site survey - a reliable supplier will patiently explain the reasoning behind the decision and will not automatically steer you towards the more expensive option when the more economical choice would give a satisfactory result at your site.

P4 or P5: what practice shows

Experience from completed projects suggests that in indoor commercial environments - where customers typically move within 2-5 metres of the wall - P4 or a finer pitch is often the preferred choice, while for outdoor facade or car-park installations, where the typical viewing distance is above 8-10 metres, P5 or a larger pitch is established practice. This is not a rule but a guide - every site is different, which is why it always pays to decide on the basis of a specific survey.