Actually, with the Advanced Lighting Timer, you can do this with one Light On Level specification: D+45=0%,N-45=50%,N+60=95%
When using D/N ((Daytime and Nighttime) in the specification, view this as a continuous circular specification. From 45 minutes after sunrise (D+45), the light will not come on (0%). From 45 minutes before sunset (N-45) to 60 minutes after sunset (N+60), the light will come on at 50% (or whatever you want). From 60 minutes after sunset, the light will come on at 95% until the next time specified in a circular way, which is D+45 (45 minutes after sunrise). Using 95% instead of 100% is barely noticeable, but it allows the user to override the timer by turning the light ON manually, which is usually 100%.
Paul