Choosing the Right Pixel Pitch for Your LED Wall
P1.9 or P4? The single most misunderstood number in LED procurement — and a simple viewing-distance formula that gets it right every time.
Outdoor advertising displays in most Indian municipal areas require local corporation approval, and in some locations traffic police clearance for road-facing screens. Structural stability certification from a licensed engineer is typically mandatory for any elevated installation. Start this process before hardware is ordered — approval timelines routinely exceed manufacturing lead times.
An IP65 rating covers water ingress from the front and rear faces, but cable entry points are where installations actually fail. Insist on gland-sealed entries and a drip loop on every cable. For Chennai and coastal sites, specify corrosion-resistant cabinets — magnesium or cast aluminium — and check that the powder coating carries a salt-spray rating.
Nine out of ten outdoor LED failures we are called to repair are water at a cable gland or heat at an under-ventilated power supply. Neither is a screen fault.
Decide the maintenance strategy before the frame is fabricated. Front-maintenance cabinets need no rear walkway and suit wall-hung installations. Rear-maintenance designs need 800mm of service space behind the screen. Choosing rear maintenance and then discovering there is no room behind the wall is an expensive mid-project discovery.
Budget for a proper commissioning day: point-by-point brightness and colour calibration across the full wall, brightness scheduling tied to ambient light, and a content test at native resolution. A wall that has never been calibrated will show visible module-to-module colour banding within its first year.
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P1.9 or P4? The single most misunderstood number in LED procurement — and a simple viewing-distance formula that gets it right every time.
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