Hey! It is actually not an off the shelf product. We cut LED light tape down to the appropriate length, secure it to a piece of black anodized angle aluminum using 3m double sided exterior VHB tape. The angle aluminum acts as a baffle to reduce glare in locations where the LED diodes might be visible (a stairwell for example). Typically 3/8ths inch angle aluminum works. On a single step often there is no need for the baffle. The angle aluminum is then attached directly to the underside of the step using VHB tape with construction adhesive at the beginning, middle, and end of the angle aluminum. If you want some links to supplier websites send me your email address and I will contact you directly.