Using these GU10 exterior adjustable head bar lights is easy. First, have a licensed electrician install them according to the instructions in the box. You'll need to choose the recommended GU1001 or GU1002 globes and install them in the GU10 lamp holders. When using, ensure the input voltage is within the 110 - 265V AC 50/60Hz range. For maintenance, keep the lights clean by gently wiping them with a soft cloth. Avoid using abrasive materials. If you live in an area with harsh weather or heavy rainfall, consider using IP65 fittings instead. This will help keep your lights in good condition and avoid warranty problems. And remember, if anything goes wrong within the 2 - year warranty period, you can get a replacement.