In order for lighting to fit your needs exactly, sometimes they required additional features. This can include Class 2 or Double Insulated lights, as they are also known as. Double Insulated lights are required especially in older properties where an Earth wire may not be present. Other features, for example switch wall lights, comes down to personal preference. Having a way to select these out specifically makes your browsing so much easier and less time consuming, something we all need in our busy lives.