If you are interested in DIYing step stair lights, there are a few things to keep in mind to ensure that the project is safe and successful. Here are some general steps to follow:

1. Plan your design: Consider the layout of your stairs and where you want the lights to be placed. Decide on the type of lights you want to use (e.g., LED strips, individual LED bulbs, or rope lights) and the power source you will need.

2. Gather your materials: Depending on the design you choose, you may need lights, a power supply, wires, and connectors. You will also need tools such as wire cutters, pliers, a drill, and screws.

3. Prepare the area: Before installing the lights, make sure the area is clean and free from debris. You may also want to mark where the lights will be placed with a pencil or tape measure.

4. Install the lights: Depending on the design you choose, you may need to drill holes for the lights or attach them with adhesive. Make sure to follow the manufacturer's instructions carefully and use the appropriate mounting hardware.

5. Connect the wiring: If you are using individual LED bulbs, you will need to connect the wiring between the bulbs and the power source. Make sure to follow the manufacturer's instructions carefully and test the connections before mounting the lights.

6. Test the lights: Once the lights are installed and wired, test them to make sure they work properly. If there are any issues, troubleshoot the problem before proceeding.

7. Finish the installation: Once the lights are working properly, finish the installation by securing any loose wiring or mounting hardware.

It's important to note that working with electricity can be dangerous, and it's always a good idea to consult a licensed electrician if you are unsure about any aspect of the project. Additionally, make sure to follow all safety precautions and use appropriate protective gear when handling tools or wiring.