Hi Trevor. I am from the Montreal area; nice to meet another Canadian grower. I revamped my orchid growing area in September 2023. I am now growing on a 2 tier light garden using LED lights purchased from BotanicalLED--2 48" Full Spectrum Plus "Optimum" LEDs on the top shelf (lower light requiring plants--8 phals, 2 paphs, 3 oncidium, 1 cymbidium ensifolium) and 2 48" Full Spectrum Plus "Spike Producers" LEDs on the lower shelf (high light requiring plants--14 cattleyas, standards and minis, and 1 neostylis). The lights are on 12 hours a day from November to April (winter), 14 hours a day from May to October (summer). The humidity is at 50%-60% using a cool air room humidifier. An oscillating standing fan runs 24 hours a day to maintain good air circulation. The night temperature is house temperature of around 20°C; daytime temperature is 25°C using a room heater running for 10 hours in winter and 12 hours in summer. The heater is turned on 1 hour after the lights go on in the morning and turned off 1 hour before the lights go off in the evening. It has taken a while to tweak the set up but it is now working well and I am quite pleased with how effective it is turning out to be. I have lots of new growths and new roots starting on the cattleyas, lots of new roots on the phals. 3 phals are in bloom, 1 mini-cattleya in bud. I fertilize regularly at 1/4 strength, flushing the growing medium once a month.
In the past, I used to put the cattleya plants outside during the summer, from end of May to mid September. But, I am stopping that as I do not want to introduce any insects into my growing area. In the past, I had infestations of spider mites, scale, Bois Duval scale and mealy bugs, fortunately, no thrips. The government has really limited the availability of pesticides to deal with these infestations for the home gardener. And, I really do not like using toxic chemicals. So, no summer holidays for the plants, just "staycations"
I don't find the cattleyas finicky in my set up. Hope that helps.