This MaxDim Model-A LED Dimming Control System (EDMO# 2901045001) is approved in hundreds of aircraft, from single-engine pistons to multi-engine jets. Rheostat control is a huge control upgrade from Bright/Dim/Off toggle switches. And due to its small size, the LED dimmer has many installation options – from cockpit to cabin. This dimmer is a perfect update for any aircraft that originally shipped with bulbs and is ready for an upgrade to LEDs.