Very nice Monica! I have about 15 oncidium related plants. I used to have them in the window but due to space restrictions they are now under lights. They flowered a lot better when they had a sunny position. I'm hoping I finally beat the black spot problem. I water mine by taking them to the bathtub and showering them with a watering can and aquarium water. Last April I started adding fungicide once a month. No spotting since then. Don't know about the temps. Mine are 68F daytime 60F at night during the winter.