| | Station Information - Stage lighting |
 | | ERS: The Ellipsoidal Reflector Spotlight is also sometimes known as a 'Leko'. |
| | The reflector cannot be larger than then lens aperture, and thus all the radiated light that is neither reflected by the parabola behind the bulb or emitted directly through the lens is absorbed by the casing as waste heat. |
| | It replaces the portion of the Ellipsoid behind the bulb with a parabolic reflector focused on the filament, and additionally replaces the portion of the Ellipsoid immediately surrounding the aperture with a spherical reflector focused on the bulb. |
| www.stationinformation.com /encyclopedia/s/st/stage_lighting.html (1828 words) |
