Stella-HB Lens LEDiL Stella HB Lens is designed for use with Bridgelux's VERO18 Series LEDs. It produces a high bay type light beam with a viewing angle of 75° and an efficiency of 93%. The optic material is clear silicon, and it is fastened in place with a screw-in holder system. LEDiL Stella HB Lens is 90mm in diameter and is 19.5mm in height.