clear_horizons, four_lights -- Well, both are from lines Picard has said in the past. In Nemesis, Picard offered Riker and Deanna 'clear horizons' along their journey and marriage. When he was being tortured by Cardassians, he refused to give in to conditioning, stating there were four lights when they wanted him to see five.

cognitive_array -- Spot is of course a genius, and Data commented on this, referring to Spot's cognitive array in a poem called "Ode to Spot".

lightspeed_attk -- This one's obvious. Sonic's specialty attack since Sonic Adventure has been his Lightspeed Attack.