When you think of sign lights you may naturally think of something for a shop or business. Don't let the name put you off, though, this is just one of many uses for sign lighting. They also have lots of domestic applications. They can be an incredibly interesting fitting for illuminating door numbers or names.
You may also want to use them as accent lighting to show off the period features of a building. As you can imagine they can also be used to illuminate simple things like hanging baskets. Remember just because they are called sign lights doesn't mean you can't use them anywhere you think they would suit perfectly.