The Reticule Enhancement Module T Bar 3 (REM T3) fixes the problem that is inherent in the White Ghost Ring Sight of the P90/PS90 Weapons System. We all know in certain low light conditions or when aiming at bright or light colored backgrounds, the Ring Sight looses its sight picture. When that happens just turn on the REM T3 and you will get a sharp T bar sight picture. The REM T3 Illuminates the T bar of the Ring Sight via a RED colored LED that sits in the rear light collector well. The LED housing is made of a hard plastic that is sized to create a tight friction fit. There is no need to use tape or glue. Just push it down into the light collector well and it stays put. The LED housing was designed to sit low in the well so it will not interfere with the field of view. The REM T3 has 11 illumination settings so the T bar can be seen outdoors in daylight on its brightest setting (even against snow or white backgrounds) or in total darkness on its lowest setting.