Pendant light size guide 💡!! Are your pendant lights the right size? Often I see people with lights that are either wayyy to small or absolutely ginormous. This really throws the proportions of the room off and makes it look a bit…😬💩 So, these are 3 formulas you need to know when buying feature lights. For a guide you can use this general formula for a room: Width Length and divide the answer by 12 ! This is not a totally foolproof formula BUT it will give you a ballpark for the right size 👌