T5 lamps are long, glass fluorescent tubes that are available in a variety of lengths. During the first few weeks of existence, seedlings and cuttings can be rooted under fluorescent strip lights. These lamps provide much less light than HIDs, which is why they are ideal for this particular stage of a plant’s life. They promote developmental growth by supplying cool, diffused light to cuttings and seedlings. However, they can also be used for vegetative, low level plants where even distribution is required and supplementary flowering.