Stair step lights outdoor with an IP66 rating are designed to withstand outdoor elements such as rain, snow, and moisture. An IP66 rating means that the fixture is protected against dust, heavy rain, and water jets from any direction, making it suitable for outdoor use in harsh environments.

When selecting stair step lights with an IP66 rating, here are some factors to consider:

1. Mounting type: Stair step lights are available in a range of mounting types, including surface-mounted and recessed-mounted. Consider the location where you plan to install the light and choose a mounting type that is suitable for that location.

2. Brightness: Stair step lights are available in different brightness levels, measured in lumens. Consider the amount of illumination you need and choose a light with the appropriate brightness.

3. Color temperature: Stair step lights are available in a range of color temperatures, from warm white to cool white. Consider the ambiance you want to create and choose a color temperature that fits your needs.

4. Energy efficiency: LED lights are known for their energy efficiency, so look for a fixture that is energy-efficient and has a long lifespan.

5. Durability: Stair step lights with an IP66 rating are designed to withstand outdoor elements, so choose a fixture that is durable and can withstand harsh weather conditions.

By considering these factors, you can select stair step lights with an IP66 rating that provides the right combination of illumination, energy efficiency, durability, and aesthetics for your outdoor application.