Best for your Plants: Red and Blue LED bulbs are suitable for plants heightening and thriving. * Can be used to control florescence in hydro and restrain flowering for stronger stem and leaves. * More Efficient: 100% of the power input for our LED grow lights is used for your plant chlorophyll production. * The best lighting time (led grow light lighting time plus sunlight lighting time) for plant growing should be 10-14hrs. * When your plants need more light please lower down the height. The light wouldn"t burn plants close to them.