1. “Empty” levels of consciousness used as a general measure of vertical development. A measure of the degree or “altitude” of awareness in any particular stream. These altitudes are often described using the colors of the natural rainbow: Infrared, Magenta, Red, Amber, Orange, Green, Teal, Turquoise, Indigo, Violet, Ultraviolet, and Clear Light. 2. Enduring structures that are actually laid down along these markers of altitude and thus are roughly synonymous with basic levels of consciousness. These are the rungs in any developmental ladder. Cognitive development, for instance, is often used since it is necessary but not sufficient for development in other lines.