Our lithops are going through flowering conniption fits right now. (OK, not really conniption fits, which refers to "a fit of anger or panic expressed loudly." No anger here. Just a lot of bodacious flowers!) We must have 20 or more flowers at a time. This one is Lithops lesliei var. venteri in the early stages of opening up wide.
One factor is that all of our lithops are now under lights for the winter, and they love it.