I bought LED solar tube (Sendai name plate) 32609464 (order code), but it is not on or on. It disappears after about 5-10 minutes since it got dark and lights up, and it does not turn on or off after about 5 minutes. Recently I felt sunset faster and I felt strange and watched carefully for a while. Today I did not mention it when I returned from the scene. It is understandable that it does not come in or going out when it is light and light at dusk, but it is meaningless if it is not dark but it is dark. No doubt, is this product such specifications? Or a defective item? I felt strange at the arrival of the item, but this product did not contain any paper such as an instruction sheet. It was only in a transparent plastic bag. The owner at the site he was using said that he never saw the lighting on when he went home at night.