Lutron is the next connected home lighting company to add their name to the list for Amazon Echo support of their products. Philips Hue, WeMo, Nest, Insteon and Samsung's Smart Things were the first companies to jump on board (or later add) support for the Echo. Customers can now add Lutron devices via the Alexa app as well.
Lutron was one of the first companies to add Apple Siri support to their lighting products. Be sure to check out the link for their various options.