Hi dpochtrager,
Please have a look here:
https://www.amazon.com/clouddrive/share/kc5upDe5RCSlwWhrjZwLnOT7gKJxNd9WoDrVa3on1qV
The User Data Tag has three parameters:
Current RND –– to show the value that the setup produces (this is a result-only field)
MaxVal –– The maximum a random value should have (positive values only)
Interval –– How long the same value will be provided (frame-wise)
The User Data Tag is then used in the Material for the Sun.
If you would like to limit the lower value as well, perhaps use a Range Mapper between Math Multiply and Condition2.
My best wishes