Light polarizers are used in conjunction with polarizers over the camera lens to help reduce glare on surfaces that would otherwise produce hot-spots/glare. Machine Vision Direct can customize many of our lights to come polarized from the factory so that external polarizers are not required. If there are ever any questions in regards to which polarizer is right for you, contact our applications team at (800) 834-5588 for assistance in choosing the right polarizer for your use case.