High efficiency. Emit red(660nm), blue(460nm) and orange(610nm) only, which are the most helpful for plant growing. * Energy Saving. Compare with high pressure sodium(HPS) and fluorescent grow lights, it saves up to 80% energy. * Red LED(660nm): Blue LED(460nm): Orange LED(610nm)= 7:1:1 * Maintenance Free. Extremely long life reduces re-lamp frequency. Save your effort to replace bulbs with short lifespan. * Solid State. Shockproof and vibration proof