Foxman that package is a series of LED blacklights that are screwed to the undersurface of the rubrail. They are handy and I since I have never hurt one in a lock(which Im in quite a bit) I figure they are indestructable as well. I would recommend 6-8 per side. I have 4 per side and will double that upfront myself this spring.You can see a picture of them in the parts section under lights. Dont forget- they arent traditional lights- gotta goto good ol Stren Flourescent mono to get the most out of them-C.O.D. Jr. III