Spectral range effects on plant physiology: 280nm ~ 315nm influence on morphological and physiological processes is minimal 315 nm ~ 420nm chlorophyll absorbs less impact photoperiod effect， prevent stem elongation 420 nm ~ 500nm (blue) chlorophyll and carotenoids absorbed the largest proportion， the greatest impact on photosynthesis 500 nm ~ 620nm dye absorption rate is not high 620nm ~ 750nm (red) chlorophyll absorption rate "high"， has a significant influence on photosynthesis and photoperiod effect 750nm ~ 1000nm absorption rate， stimulate cell elongation， impact of flowering and seed germination > 1000nm converted into calorie 1) Product Specifications: • Item: Brand New Epistar 10W led grow light • Optics: Secondary Married Diamond Lens • LED Chips: 2W Epistar • LED Quantity: 5pcs • Full Spectrum: 2pc 650nmRed + 1pc 700nmRed + 2pc 450nmBlue • Input Voltage: AC85-265V • Lumens: 800lm • Lifespan: 50000hours • Base Type: E27 • Size: Dia4.8 x 7.3cm • Weight: 0.07kg 2) Product Features: • Energy Electricity Saving with Higher-level Efficiency. 1W LED can replace 5W HPS，HID，MH，Incandescent & Halogen Lamp • Full spectrum that is necessary & critical for plants growing & flowering (from seeding to harvest • 450nmBlue & 700nmRed is accelerating leaf growing • 650nmRed is promoting flowerin • Perfect for small Grow Box，Grow Tent，DIY Hydroponics，Bonsai，Garden... etc • Comfortable， Humanistic & High-performing