Using these MARINA exterior LED wall lights is easy. First, make sure you have a licenced electrician install them as required by the warranty. The lights are suitable for 2 - way switching and can be used with PIR or Microwave sensors, which you can set up according to your needs. They work well in an ambient temperature between -20°C and 50°C, so you don't have to worry about most weather conditions. For maintenance, simply clean the PC diffuser and bracket gently with a soft cloth. The aluminium housing is durable and doesn't need much special care. Remember, always check the IP rating to ensure it's suitable for your intended use. And if you encounter any problems within 3 years, you can get a replacement under the warranty.