The Lumistar Sight / Light Fittings can come in the classic half moon shape for the combination of light and sightglass. The standard product of the Lumistar Sight / Light Fittings comes with a momentary push button.
The light fitting on the Lumistar Sight / Light Fittings is normally attached to the sightport cover flange by two or four screws.
Visit the Visilume Ltd website for more information on Lumistar Sight / Light Fittings