query_own_light
set_own_light
add_own_light
query_light
query_inner_light
query_outer_light
query_eye_level
set_eye_level
query_visible_in_the_dark
can_see
cannot_see
query_room_description
describe_room
describe_current_room
notify_light
notify_extinguish
notify_burned_out
query_daylight
query_light_description