1. Plan the lighting layout - Determine where you want fixtures and what type of lighting you want (i.e. floodlights, spotlights, wall washers, etc.).2. Select the fixtures - Choose fixtures that are rated for outdoor use and are compatible with the type of wiring you have available.3. Install the wiring - If you're installing new wiring, contact a qualified electrician to do the job properly. If you're reusing existing wiring, be sure to check it for damage and repair or replace as needed.4. Install the fixtures - Follow the manufacturer's instructions to install the fixtures securely and connect them to the wiring properly.5. Test the lights.

There are a few things you need to take into account when planning and installing exterior building lighting. The first is safety - make sure the bulbs and wiring are safe and up to code. The next is function - what do you want the lights to achieve? And finally, aesthetics - what kind of look do you want? Once you have these considerations in mind, it's time to start planning. Decide where the lights will go and how many you need. You'll also need to figure out what kind of bulbs or fixtures you want, as well as the wiring setup. Once that's all planned out, it's time for installation!