Light from sun exists everywhere, vi. 4.6 (22-[296]).
Light in eye, v.7 (32-[586]); v. 6.1 (24-[334]); iv. 5.4 (29-[500]).
Light intelligible, v. 5.8 (32-[587]).
Light intelligible is not spatial, has no relation to place, v. 5.8 (32-[587]).
Light intermediary is unnecessary, being a hindrance, iv. 5.4 (29-[521]).
Light is composite of light in eye and light outside, v. 6.1 (24-[334]).
Light, is it destroyed when its source is withdrawn or does it follow it? iv. 5.7 (29-[526]).
Light, objective and visual, mutual relation of, iv. 5.4 (29-[520]).
Light, objective, does not transmit by relays, iv. 5.4 (29-[522]).
Light, relation to air, iv. 4.5, 6 (29-[524]).