Thank you for viewing. This is the TORM LED white interior light sold by TAMTAM. It is the K type (for KATO) and there are 10 pieces. I am selling these because I purchased new interior lights and no longer need them. These were installed in my 10-car train set. I have confirmed that all of them light up. Of the 10 pieces, 2 were installed in the lead cars, so the prisms have been slightly cut. If you have any questions, please comment.