Anywhere where you want to create directional light. The wing nut undoes so you can change the angle to be between 90 and 270 degrees and then tightened again. These are used for example to make aDirectional Lamp holder.
Lamp Knuckle Joints
Linnkyfloa Luminous Swimming Pool Fountain with Adjustable Waterfall Sprinkler, Glowing Green Nozzle Ambiance, ABS Construction 1.5 Inch Threaded Joints, Above and In-Ground Pools
Axorafow Luminous Swimming Pool Fountain with Adjustable Waterfall Sprinkler, Glowing Green Nozzle Ambiance, ABS Outdoor Spa Decor 1.5 Inch Joints
2Pack Dusk to Dawn Outdoor 100W LED Flood Light with Knuckle&Plate, 3000K/4000K/5000K Color Selectable, 14000LM 1000W Equiv., ETL Commercial LED Floodlight, Outdoor Security Lighting for Parking Lot
kadision LED Flood Light with 180° Adjustable Knuckle, 50W Security Lights IP65 Waterproof Outdoor Lighting, 250W Equivalent 5000K 5500lm 100-277Vac, ETL DLC Listed 10-Year Warranty (No Photocell)
Outdoor LED Flood Light 150W Sunrise with Knuckle, 21000LM 1500W Equivalent, 100-277V 5000K, Commercial LED Flood Light, ETL Outdoor Security Lighting
