Uh, no. What that says is that there must be a system BESIDES the main cabin lighting that will illuminate during an emergency. In the case of Boeing and Airbus aircraft, these systems are battery powered, or in some cases, they use safe-t-glo strips that have to be maintained by checking them for luminescence. So, while you got the right info from the FAA website, this does not say that the main cabin illumination must be turned off during take-off and landing, it simply describes the system that must be in place and operable in an emergency on any aircraft used as a transport aircraft. Drumgod - What are you talking about? The electrical system is driven by generators on the engines and, when switched on, the APU. When on the ground, it's either the APU (when the engines are off), or ground power. Hydraulic pumps provide HYDRAULIC power.