I set up a DIY moonlight setup using a very cool LED
fixture from IKEA that I had from a while back and a christmas lights dusk to dawn timer. The LED
setup is here DIODER Light strip - IKEA
and the dusk to dawn timer is from last christmas.
I used double sided foam tape to mount the LED
fixtures in my existing light, and the timer sensor just happens to be about 2 feet off to the side of the fluorescent fixture. I set the dusk to dawn timer to be on for 2 hours after "dusk", so when my normal flourescent fixtures timer shuts off, the moonlights turn on for 2 hours. This works because the LED
fixture remembers the last color it was set at and the timer just turns it on. This would have been a deal breaker if it defaulted back to something else each time the timer disconnected the power.
The interesting thing is I actually have different built in colors if I want; I use the blue/green for my moonlight, and sometimes change the light pattern to transitioning for an interesting effect. It turned out to be a very nice setup