P2.5 and P3.91 are the two pitches that appear in almost every rental and indoor project quote. The difference between them is not image quality in the abstract — it is how close the nearest viewer stands. Choose by that number and the decision takes about a minute.
The arithmetic that decides it
The working rule for LED is that the nearest viewer should stand about 1,000 times the pitch away, in metres. At P2.5 that is 2.5 m; at P3.91 it is 3.9 m. Inside that distance the pixel structure becomes visible on fine detail — thin text, straight edges, faces. Beyond it, the two panels are indistinguishable to the eye, and the only difference left is the invoice.
So the first question for any project is not "which looks better" but "how close does anyone get". Front row of a conference room: 2 m. Front of a stage: 4 m or more. A camera on a shoulder rig: closer than anyone, which is why camera work sets a different constraint.
Same cabinet, different pixel count
Both pitches usually ship in the same cabinet format, which is what makes the comparison clean. A 500 × 500 mm cabinet holds 200 × 200 pixels at P2.5 and 128 × 128 at P3.91. The physical cabinet, the rigging hardware and the flight case are identical — you are choosing how many drivers and receiving-card channels sit behind the same face.
Two consequences follow. First, the finer pitch draws more power per square metre and generates more heat, because it is driving 2.4 times as many pixels. Second, the processor has to push 2.4 times the data, which matters when you are feeding a large wall from a single output and running at 60 Hz.
Where P3.91 is the right answer
- Stage and event work where the audience stands at 4 m or more.
- Outdoor or semi-outdoor rental, where the IP65 cabinet and higher brightness matter more than pixel density.
- Large walls where the total pixel count would otherwise overwhelm the processor — a 40 m² P3.91 wall is about 2.6 million pixels; the same area at P2.5 is 6.4 million.
- Budget-limited projects where the saving buys a better processor or more spare modules.
Where P2.5 earns its premium
- Boardrooms and control rooms where the nearest seat is under 3 m.
- Retail and lobby installations that people walk up to and photograph.
- Broadcast or streaming sets, where the camera sees the panel at a distance closer than any seated viewer.
- Any wall that will show text-heavy content — dashboards, schedules, subtitles — rather than video loops.
The camera changes the answer
A camera resolves more than the eye at the same distance, because it can zoom and because footage is examined frame by frame. A wall that looks clean at 3 m to a person can show visible pixel structure on a phone video taken from 6 m. If the screen will appear on camera — and in 2026 almost every screen does — the effective viewing distance is the lens distance, not the seat distance. That usually pushes the decision one pitch finer than the room alone would suggest.
Power and heat, which nobody quotes
The finer pitch consumes more per square metre at the same brightness, because more drivers are switching. On a temporary stage that is a distribution question: the electrician needs the maximum draw, not the average, and the finer panel can push a circuit that was sized for P3.91. Indoors it is a cooling question, and meeting rooms are routinely sized for a projector rather than an emitting wall.
The mistake to avoid
The expensive mistake is buying P2.5 for a room where nobody comes closer than 5 m. It costs more, draws more power, needs a bigger processor, and looks identical from the seats. The opposite mistake — buying P3.91 for a 2 m viewing distance — is rarer but worse, because the pixel grid is visible on every face on screen and cannot be fixed afterwards.
Where this fits
Both pitches are available in the rental range on the same cabinet and lifting hardware, with the IP65 variants for outdoor work and the finer indoor units for close viewing. If you are still working out the distance, the viewing-distance note sets out the full arithmetic.
Rental range — P2.5 and P3.91 on one cabinet · Viewing distance and pitch, worked through
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