Spider FD-E4800W Upgraded LED Grow Light LM281H EVO Commercial Grow Lamp 4×4 5×5

CTLite FD-E4800 — 420W Commercial 🚀 420W · 5×5ft · 0 dB · 3Y 1504 LM281B LEDs — 5×5ft flower / 4×4ft veg · 1773 PPFD 💡 420W: Replaces 1800W HPS · 30% yield 📐 5×5ft: Commercial coverage · 1773 PPFD 🔇 0 dB: Silent fanless · 50% longer life 🔗 Daisy Chain: 100+ lights · one control ⚡ Dimming: 0-100% knob 🛡️ IP65 + ETL: Waterproof · certified 🏗️ Detachable: Easy repair · saves shipping 🛡️ 3Y: Warranty 🏆 Beats SF & Mars: 5×5ft · IP65 · 0-10V · 100+ chain 🌿 Perfect for: 5×5 Tents · Commercial Greenhouses · Vertical Farms · Cannabis · Seed Starting 🔬 Science Behind It: PPFD: 1773 µmol/s — commercial intensity 660nm red — flowering trigger 450nm blue — compact growth Efficacy 2.7+ µmol/J — lower bills ❓ Quick FAQ: Power? True 420W — not equivalent Coverage? 5×5 flower · 4×4 veg Noise? 0 d.