I designed this bracket that will hold an LED strip under a shelf at a 45° downward angle. It's specifically designed for the Performax steel shelving system sold at Menards, which has a 2mm lip under the shelf surface perfect for sliding this on to. Your mileage may vary. Print a bunch of 'em and thread your LED strip through. Should work with any strip thinner than 3mm. Print upright, no supports needed. I used a brim.