There are potential security applications for things like that. For instance, a randomized on-off pattern for lights in your house to help throw off casual thi

There are potential security applications for things like that. For instance, a randomized on-off pattern for lights in your house to help throw off casual thieves. Or, tying the system to the burglar alarm so that all the lights come on and the blinds open when the alarm goes off in order to bring more unwanted attention to the thieves. As others have mentioned, there is also the light-sensitive timer use case.