Adeniumgirl said:Yes ofcourse I do have brightness.
This is my greenhouse. When the sun does shine it get's sun. The are polycarbonate. So it will not get full sun. It is a bit protected. I did take that because it will give a bit protection in winter from frost. So that I do not have to put my heater to high.
@Adeniumgirl
Willeke, I moved your post from another thread and will continue our discussion here.
You had said in the beginning of our discussion, the location of the greenhouse faces south/southeast. In your hemisphere of the world, that location appears to be very good. Your adeniums will get a lot of sunlight...it is not north facing where you will get mostly shade.
I looked up general climate info for Netherlands (don't know what city you're in) and found that during summer the warmest it gets there is 71F (21.7 C). During your summer I do not believe you need the greenhouse for your adeniums. That wall facing south/southeast will absorb heat throughout the day and will radiate warmth at night; it will also reflect some sunlight so light will be more intense in that spot during the day.