The Mole-Richardson 150W BabyLED Fresnel Retro-Kit (Tungsten, DMX) includes a MoleLED Tungsten trough, a MoleLED specific fresnel lens, and a hardware package with tool. This retrofit kit helps to keep the Mole-Richardson Fresnels (sold separately) working for another generation. This self-contained trough allows you to convert your existing Tungsten Fresnels to a Tungsten LED with no modifications needed to the head. You can keep your original Tungsten trough for future use, and switch between the two in minutes, should the need arise.