Using these exterior LED bulkhead lights is easy. First, find a suitable location for installation. Remember, a licenced electrician must do the installation, and you'll find installation instructions in the product box. Once installed, these lights are ready to use. They support 2 - way switching, so you can control them from different places. You can also pair them with PIR and Microwave sensors for added convenience. However, they're not suitable for dimming. In terms of maintenance, keep them clean. Wipe the frosted diffuser gently to maintain good light diffusion. Be aware that unless protected, they're not ideal for areas with harsh weather or heavy rainfall. Check the IP rating to ensure it matches your usage environment. If you have any issues within the 2 - year warranty period, you can get a replacement.