Yield Lab 36 Watt Chip LED Grow Bulb &ndash; Advanced Spectrum 3w &ndash; Hydroponic, Aeroponic, Horticulture (Blue) KEEP YOUR COOL: These are the coolest running LEDs on the market. Its aluminum body is designed for optimal cooling to maximize efficiency and allow you to place lights close to your plants without worrying about heat damage, such as bleached or fried leaves. MULTIPLE APPLICATIONS: A multipurpose light is essential for all indoor growing enthusiasts. The blue spectrum (430-460nm) is essential for leaf growth during the vegging stage of plants, and can grow smaller plants such as herbs and chilis on their own. It can also be used as supplemental lighting in your existing setup. OPTIMUM LIGHT PENETRATION: The 90 degree lens on each diode is the perfect angle for spreading light coverage throughout your garden or growing environment. A 120 degree lens can suffer from weak light intensity, and 60 degree lenses offer hardly any coverage: ours is a happy medium. SPECIFICATIONS: Output voltage: 100-240V; frequency: 50-60 Hz; LED quantity: 12 pcs; lighting coverage: 0.66 ft  6.6 ft. SATISFACTION GUARANTEE: We are proud to be an industry leader in grow equipment and stand by our professional grade products. Thats why we offer a 1 year warranty against manufacturer defects and a 120 day satisfaction guarantee.