Safety "Keyed" Light Switch - Front Slit

Edit May 7, 2017: I added a photo of a high-resolution (100µ) print of the light switch cover in white. This came off of my FFCP with no sanding or post-print work. High-resolution takes a lot longer, but it's sometimes worth it!

Oh, and if you need a key for this cover, please visit my other Thing, the "Super-Secret High-Security Key":

http://www.thingiverse.com/thing:2296541

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Starting to use LIFX+ infrared lights with my security cameras, and I realized I needed a safe way to stop people from turning the light switch off. I tried the original, but when I used it in a teen's room, he ended up turning it off from the side anyway, saying: "If you didn't want me to turn it off, why did you leave a hole?" Ah ha!

So I decided to re-design something from my childhood: the infamous "keyed light switch" that foiled all but the most ingenious of engineering types. This model has a much larger opening in the front, which accommodates all sorts of household objects but NOT (most) fingers. Whew! Both sides are, obviously, closed off.