Hue is the answer - assuming you're running internet down there.
Ideal setup would be something like:
- Run ethernet to the shed / office
- Have an access point (google wifi etc) in the shed / office
- Setup a hue bridge for the house
- Install Hue bulbs on the outside / inside of shed / office
- Control from app
This is what we did for our garden office in the last house as it was used as an office.