Propagation lighting is important for the early stages of your hydroponic plants, as propagation lights are a lower powered light so that it doesn't harm the plants. Having a too high powered light above your plants can be damaging due to the intensity of the light and the heat given off. Propagation lights on the other hand, produce very little heat and produce the right amount of light for your plants in their young stages.
Propagation Lighting For Hydroponic Gardening
It is true that all types of plants need UV light in order to grow and it is especially important that the plants receive the proper amount of UV light during the various stages of plant propagation. During hydroponics propagation, the plants are being grown from either seeds or cuttings, so they need extra care until they are completely established. The hydroponics grow lights need to be positioned properly.
If the propagation lights are placed to close to the young plants they can cause heat damage. The best propagation lighting to use in small grow rooms is the type that can alternate between high pressure sodium and metal halide bulbs so that it is not necessary to install a separate plants grow light once the plants are in the flowering stage. If the growing light is producing too much heat in the grow room, it might be necessary to install air cooled lights.