Using these exterior LED bulkhead lights is easy. First, make sure to have a licensed electrician install them as required. You'll find an installation instructions sheet in each product box to guide the process. The large terminal holes make connecting the wires a breeze. These lights are suitable for 2 - way switching and can be paired with PIR or Microwave sensors, which you can set up according to your needs. When it comes to maintenance, keep in mind that the ambient temperature for normal operation is between -20 and 45 °C. Try to avoid using them in harsh weather or heavy rainfall areas unless they are well - protected. If you need a fitting for such tough environments, consider an IP65 rated one to prevent warranty problems. With a 3 - year replacement warranty, you can have peace of mind knowing that your investment is protected.