The assemblies are a direct replacement for older style incandescent bulbs, fitting into the roundel ring as a replacement for the existing roundel, reflector and bracket.
Murphy's primary method will be something called "laser ranging."Light from a laser fired from the Earth could hit a reflector on the surface of the moonbounce back.
A new dynamic model is developed for simulating the widely tunable grating assisted codirectional coupler with rear sampled grating reflector (GCSR) lasers.