Depends what type of Orchids you have but many of the orchids like morning sunlight, try to avoid direct sunlight. They also hate tap water, try using RO water. Many people kill Phalenopsis Orchids my overwatering. When you water, water deeply or simply submerse your orchid container in some RO water for several minutes so It can saturate the orchid mix and roots. Let it completely drain. You should let your orchid dry out before watering again. You likely won't need to water for another 2-4 weeks depending on the type of orchid, its size, and the size of the pot it is in. Many types of orchids like some mistings with RO water. Cold weather and fewer hours of light may induce flowering depending on the type of orchid. Good luck!
Simon