Projectors

Wincomn & Krinda laser projectors — 4K UHD, WUXGA installation, 25,000-lumen large venue and simulation

Quick sizing: throw distance = throw ratio × image width (1.5:1 × 4 m = 6 m). Allow ~7k lumens for a 4 m screen in a normal room, 12–15k for 5–8 m or bright halls, and 20k+ for outdoor mapping. Every projector has a laser light source rated 20,000–30,000 hours — no lamp replacements.