Moon almost invisible, especially at mid-totality. Details distinguishable only with difficulty. Deep red or rust-colored eclipse. Very dark central shadow, while outer edge of umbra is relatively bright. Umbral shadow usually has a bright or yellow rim.
Umbral shadow has a bluish, very bright rim.
The assignment of an 'L' value to lunar eclipses is best done with the naked eye, binoculars or a small telescope near the time of mid-totality. It's also useful to examine the Moon's appearance just after the beginning and before the end of totality. The Moon is then near the edge of the shadow and provides an opportunity to assign an 'L' value to the outer umbra. In making any evaluations, you should record both the instrumentation and the time. Also note any variations in color and brightness in different parts of the umbra, as well as the apparent sharpness of the shadow's edge.