Controlling Outdoor Lights with Sunrise and Sunset Routines

I’ve been trying to set up a routine for my outdoor lights to turn on 15 minutes after sunset and off 1 hour before sunrise, but I’m running into some issues. Initially, I set up two separate routines in SmartThings—one for turning on at sunrise and another for turning off at sunset. However, while the app notified me that the lights were being toggled, they didn’t actually change state. I then switched to using the Smart Lightning SmartApp, which seemed promising, but again, the lights didn’t respond as expected. I’ve double-checked the sunrise and sunset times in my IDE, and they appear correct. Does anyone have any tips on what might be going wrong? I’ve heard that some users have had success with similar setups, so I’m hopeful there’s a solution out there. Any advice would be greatly appreciated!