Thought I might show an example of a rule that I'm using with RM 3.0 to control my aquarium's lighting throughout the day. This would have NEVER been possible without SEVERAL rules using RM2.x thanks @bravenel!
Summary of rule:
At 9:00AM if the outdoor ambient light level is below x Lux then fade up to 80% brightness and set CT to 6500k, if it's above then wait 3 hours and then do the same. (I do this so that I'm not creating excess algae growth by providing more light than necessary if there is already ambient light available, sunrise is at 4:00am in Alaska during the summer months!)
At 5:00PM fade down to 40% and set color to blue.
At 10:00pm fade to OFF
At 8:00AM fade up to 40% blue