yip one pair is fine..give it a try! glowlights breed nice and easy i'm amazed more people don't do it.
and yip i'd black the tank out i just cover with a few towels
once you have eggs, leave for 4-5 days this is when the egg sack is used up, they will be free-swimming, and you can begin feeding them greenwater, then microworm/baby brine shrimp, then baby daphnia/mossie larvae, then crushed flake etc