What is it? An indicator lens is a raised or flush plastic cap that is fixed onto the top of a panel or stacking indicator. What does it do? An indicator lens helps to protect the bulb contained in the indicator body. Coloured lenses also change the white light emitted from a bulb into a particular colour. Colours are used to alert people to a particular action. A good example would be; RED for stop GREEN for go Applications Lenses are used in any application where an indicator is needed. Typical applications are Control panels in factories and warehouses Automotive dashboards Music studios Assembly lines Agricultural equipment Tools Types Lenses are available in various shapes, profiles and colours. Flush Domed Rectangular, round and square Clear or coloured