The innovative aluminium profile LED grow strips are made of aluminium profiles, aluminium PCB with LEDs and epoxy for waterproof. With exquisite body and flexible installation, they are perfect for DIY your own grow systems for non-professionals. They also have enough different watts for options: 9W, 11W, 22W, 33W and 44W. They can also working as a group, For example, 2pcs or 4pcs of 9W can be connected end-to-end to work together as a group.