The additonal vitamins provided by sprouted seed is hard to beat. Only soak enough to use up within 3 days. Once the seed begins to sprout, refrigerate the remainder. At least 14 hours of light a day is recommended. Remember, these are tropical birds, where the days remain the same year round.
Breeding takes place all year round.
I prefer to allow pairs to raise 3 clutches, then rest. The construction of an outdoor aviary is a very good tool. Its such an easy way to house small birds, that I cannot emphasize it enough. The birds will get good exersize, which will prevent obesity. Planted aviaries also give the benefit of small insects that the birds will find.