MARS HYDRO&nbsp;MarsII 400W Led Grow Light Full&nbsp;Spectrum&nbsp;Grow&nbsp;Lights&nbsp;for Greenhouse Indoor&nbsp;Plants&nbsp;Veg&nbsp;and&nbsp;Flower Growing Light Bulbs for&nbsp;Hydroponics (MarsII 400W) High Yield: High PPFD make sure indoor plants get maximum yield at 1.8g/ true watt. Full spectrum with IRs to maximize resin and really THC yield, is suitable for all kinds of indoor plants at all growth stages as sunlight. Perfect 250W HPS grow light replacement, ensure 40% energy saving, and fix the HPS heat problem properly. Core Coverage: 2.5x2.5ft. Max Coverage 3x3ft. Intensive led array determines the super strong penetration, and ensures 4-6 plants growing. Good for Mars Hydro 70 x 70 x 160cm grow tent. Excellent Cooling System: Two fans spinning together with big heatsink, enough for self cooling. Whole light is ETL certificated, safe to use. 3 years warranty plus 30 days satisfaction or return guarantee. Message will be replied within 8 working hours. Local Service center is available. Spectrum: 440nm, 460nm, 630nm 660nm,730nm(IR), 2400k-3000k. PPFD Value at 18&#034;: 642mol/s per square Lumen: 8563Lm5%@AC120V 8528Lm5%@AC240V Max Coverage: 4.5&#034;4.5&#034; Max Yield: 1.8g/watt Indoors use only,not water-proof Maintain stable voltage to avoid any damaged to light fixture. Do not look at the light directly when it is ON. It is bright. No extra ballast is needed. Can be controlled by Timer. Two Switches: Veg Switch and Flower Switch There are 2pcs dim IR led bulbs. They can work normally. Three years maintenance service. Model: MARS HYDRO Mars II 400W LED Grow Light Replace HPS/HID/MH: 250watt Coverage Area Flower: 2.5&#039;x2.5&#039; Coverage Area Veg: 3&#039;x3&#039; Certification Marking: CE and RoHS Number of led bulbs: 80pcs x 5watt chip Spectrum:440nm-460nm, 630nm-660nm, 730nm(IR), 2700k-3000k Recommended Hanging Distance: Seedling: 24&#034;-30&#034; Growth: 18&#034;-24&#034; Bloom: 12&#034;-18&#034; Recommended tent: MARS HYDRO 27&#034; x 27&#034; x 63&#034; grow tent Number of Fans: 2pcs Actual Wattage at 110V: 161.7W5% Actual Wattage at 220V: 158.4W5% Heat Output: 675 BTU Input Voltage: 85V-265V(AC) Frequency Range: 56-60Hz Life Span: 50000-100000 hours Unit Dimensions: 34cmx34cmx9cm / 13.38 x 13.38 x 3.5 inches Net Weight: 5.36kg/11.82lb Shipping Weight: 6.43kg/11.17lbs