Usually, people mount the bar flat against the underside of the shelf or cabinet using the 2
Straight Brackets included with each LED light bar; however, with these optional Angle Brackets, you can tilt the bar 45° from horizontal, with additional adjustment possible, from 23° to 53°. See detailed pictures. Screws are only 0.4 inch (1 cm) long, so they won't fully penetrate most shelves or cabinet bottoms.