Of course, that would be a matter of personal preference and how you want your plants to look. Don't forget, these particular plants originated in South Africa, not Northern Europe. Even conditions similar to their natural conditions in Africa would be difficult to recreate, year-round, in Northern Europe. It is also difficult to recreate them here in the Southwestern desert region of the United States.
Most authors of books I've read, about growing plants, mention the concept of stress. Of course they mean "plant stress", but they mean anything environmental that the plant would not experience in its natural environment. Generally all "plant stress" is deemed to be on the failure side of the scale. Where environmental factors fall outside the parameters that the plant would experience in its native range. My personal philosophy is to do whatever I can to reduce that stress and keep the scales balanced towards, continued successful culture. Sometimes that might mean to over-compensate some environmental factor that I have good control of, when considering the many other environmental factors that I usually have much less chance of controlling. Here in the desert we have lots of very strong natural sunlight, nearly all year long. I grow most of my CP indoors, under lights, because outside, my natural temperatures, are too high and the humidity too low for many CP in the Spring and Summer, while they can be too cold and experience an even lower humidity in the Fall and Winter. I can achieve a lower plant stress level by growing them indoors with a more artificial environment. So, whenever I can, and when it seems appropriate, I try to more than optimize an environmental factor, to help reduce plant stress from other factors that aren't so optimum.
I find that I can endure more time outside at 110F (43C), if I can come inside my home, periodically, where the temperature is 75F (24C), than if the house were only 95F (35C).
We all grow our plants as our experience tells us to. Some of us are successful, some are not. Most of us have experienced some difficulty or failure to achieve our plant growing goals. I certainly have. But, for whatever it's worth, I will try to share my own experiences, and I appreciate hearing about my fellow horticulturists attempts, be they successes, failures, or something in-between.