Why 16:9 matters for LED video walls, how the indoor and outdoor module families differ, and the exact cabinet grids that land on a perfect 16:9 screen - with full working tables.

Why cheap unauthorized LED module imports fail - fake Qiangli stock, duty evasion risk, no warranty, colour mismatch. How authorized supply protects your money.

How to choose LED display pixel pitch - viewing distance rules, resolution math, indoor vs outdoor picks and real per-module prices in India. From Lumina, Mumbai.

Building your first LED screen? An honest GI vs diecast cabinet comparison on cost and lifespan, plus the module basics: driver IC, lamp size, power consumption and headroom.