Here are some useful references to help you choose luminaires.
The International Dark-Sky Association website lists all those fixtures that meet the "dark sky friendly" seal of approval (FSA).
The Starry night lights website offers a wide range of residential luminaires that do not light up the sky and can be ordered on-line.
Contact your local distributor of electrical supplies to order approved products.
Luminaires recommended by the ASTROLab
The tables below present several appropriate luminaires that have been rated according to their efficiency and cost.